必修4 Unit3
A taste of English humour感受英语的幽默
课时作业
Ⅰ.单项填空
1．By the time he realizes he________into a trap，it’ll be too late for him to do anything about it.
A．walks B．walked
C．has walked D．had walked
2．As a businessman he was a success，but as a husband he was________failure，so their marriage ended in________failure.
A．/；/ B．/；a
C．a；a D．a；/
3．—I’m green at everything.
—Don’t worry.________you get older，you will get more experience.
A．As B．Till
C．Unless D．Since
4．—You are late again，Tom?
—Sorry，but I got________a heavy traffic jam.
A．caught in B．taken in
C．put off D．held by
5．The whole area was________by the snow，and the government had to send food there by helicopter.
A．cut away B．cut up
C．cut off D．cut down
6．—I wonder how to________to him when I get a present from my foreign friend Jack.
—Of course say “Thank you”．
A．invite B．answer
C．manage D．react
7．Our teacher looked here and there on our playground________ looking for something.
A．even though B．even if
C．as if D．only if
8．—Why are the two students standing at the gate of the teachers’office?
—They________to each other in class and________.
A．have whispered；are punishing
B．had whispered；were punished
C．whispered；are being punished
D．are whispering；were being punished
9．—Your daughter looks too thin for her height.
—Yes.She is too________about food.There is no way of making her fat.
A．special B．particular
C．unusual D．especial
10．My friend Bob just bought an apartment in a suburb of Beijing last week，which is much smaller than ours but is three times________expensive.
A．very B．so
C．too D．as
11．—Tommy，do the dishes.
—Mum，it’s a girl’s job.I would rather________the floor.
A．to sweep B．sweep
C．sweeping D．swept
12．With the electricity________because of the road repairs，the whole building was completely dark.
A．cut up B．cut off
C．cut out D．cut down
13．All that this young man dreams of is to make________and live________.
A．a big fortune；an easy life
B．a big money；an easy life
C．big fortune；easy life
D．big money；easy life
14．Oil prices have risen________32 percent since last year，________a record $84.65 a barrel on Nov.9.
A．by；reached B．by；reaching
C．by；to reach D．to；reaching
15．He hurried to the booking office only________that all the tickets had been sold out.
A．to tell B．to be told
C．telling D．told
Ⅱ.完形填空
(2010年湖北重点中学第二次联考) “It’s my own fault.” Carl Fenter pulled his jacket closer against the abnormal bite of cold morning wind.“The rest of the family is home，where it’s__1__.”
Just another one of his__2__ideas—a big tamale (玉米粉蒸肉) feast after tonight’s Christmas Eve service at the church—and look where it landed him：waiting in a line 50 people deep.
Who would have guessed that the tamale in every shop in the city would be sold out the day before Christmas？But they__3__，as Carl knew.He had been driving all over El Paso that morning.__4__to bring home tamales，Carl tried one last shop，an old favorite out in Canutillo.
When he arrived，a fresh batch (一炉) was__5__off the steamer in 45 minutes.__6__at the end of the snaking line of tamale-seekers，he watched the woman in front of him__7__her jacket to cover her shivering youngster.It wasn’t long before she，too，__8__in the biting wind.After only a moment’s__9__，Carl took off his own jacket and offered it to the__10__mother.
Together，they__11__when the line slowly moved forward at last，and smiling people exited the shop carrying steamy bags.__12__，Carl got inside the door and__13__closer to the counter，the woman now first in line.“Sorry folks，”the clerk announced，“that’s the last of the tamales.”“__14__！” Carl groaned (抱怨) with everyone else__15__behind him.
“__16__，”stressed the man at the counter，“we’ll have a final batch ready__17__，oh，about two hours.”
Defeated，Carl backed away，but the young mother grabbed his arm.
“You’re leaving？”
“I__18__，”Carl glanced at his watch.“I promised to put up luminarias (传统圣诞灯) at my church.”
“I’ll get your order of tamales and bring them to your house.”
Carl’s brow furrowed “I couldn’t ask you to do that.”
“But it’s__19__I can do.You lent me your coat.”Her smile overrode (推翻) his objections.“Just give me your address.” She and her little girl settled in for the long wait.
And at__20__noon on Christmas Eve，they delivered four dozen fragrant tamales—along with Carl’s brown jacket—to his home.
1.A.harmonious B．warm
C．happy D．pleasant
2．A.brilliant B．bad
C．stupid D．common
3．A.were B．did
C．could D．had
4．A.Decided B．Determined
C．Wanted D.Expected
5．A.ready B．prepared
C．soon D．due
6．A.Finding his way B．Taking his road
C．Taking his place D．Finding his place
7.A.move B．reject
C．abandon D．remove
8．A.waved B．froze
C．shook D．shocked
9．A.assumption B．appreciation
C．hesitation D．attention
10．A.grateful B．respectful
C．hopeless D．shameful
11．A.cheered B．congratulated
C．shouted D．screamed
12．A.Immediately B．Hopefully
C．Lastly D．Finally
13．A.shouldered his way B．forced his way
C．felt his way D．inched his way
14．A.No problem B．No way
C．No doubt D．No wonder
15．A.lined up B．held up
C．looked up D．waited up
16．A.So B．But
C．Then D．Besides
17．A.before B．for
C．in D．after
18．A.plan to B．intend to
C．have to D．ought to
19．A.the least B．the most
C．the last D．the best
20．A.just B．exactly
C．accurately D．right
Ⅲ.阅读理解x k b1. co m
(2010年福建四地六校联考)
How Much to Tip
You’re out to dinner.The food is delicious and the service is fine.You decide to leave a big fat tip.Why？The answer may not be as simple as you think.
Tipping，psychologists have found，is not just about service.Instead，studies have shown that tipping can be affected by psychological reactions to a series of different factors from the waiter’s choice of words，to how they carry themselves while taking orders，to the bill’s total.Even how much waiters remind customers of themselves can determine how much change they pocket by the end of the night.
“Studies before have shown that mimicry (模仿) brings into positive feelings for the mimicker，”wrote Rick van Baaren，a social psychology professor.“These studies show that people who are being mimicked become more generous toward the person who mimicks them.”
So Rick van Baaren divided 59 waiters into two groups.He requested that half serve with a
phrase such as，“Coming up！”Those in the other half were instructed to repeat the orders and preferences back to the customers.Rick van Baaren then compared their take-home pay.The results were clear—it pays to mimic your customer.The copycat (模仿者) waiters earned almost double the amount of tips to the other group.
Leonard Green and Joel Myerson，psychologists at Washington University in St.Louis，found the generosity of a tipper may be limited by his bill.After research on the 1,000 tips left for waiters，cabdrivers，hair stylists，they found tip percentages in these three areas dropped as customers’ bills went up.In fact，tip percentages appear to plateau (稳定期) when bills topped $100 and a bill for $200 made the worker gain no bigger percentage tip than a bill for $100.
“That’s also a point of tipping，”Green says.“You have to give a little extra to the cabdriver for being there to pick you up and something to the waiter for being there to serve you.If they weren’t there，you’d never get any service.So part of the idea of a tip is for just being there.”
1．Apart from service，how many other factors affecting the customers’tipping are mentioned in the passage?
A．1.B．2.C．3.D．4.
2．These studies show that________.
A．tipping can be affected by physical reactions to many different waiters
B．people who are being mimicked usually tip less to the person who mimics them
C．the mimic waiters can get almost twice as much money as those who don’t mimick others
D．mimicry makes the mimicker feel bad
3．According to the passage，which of the following will be likely to show the right change of the tip percentages?
4．We know from the passage that the writer seems to________.
A．object to Mr Green’s idea about tipping
B．think part of Mr Green’s explanation is reasonable
C．give his generous tip to waiters very often
D．support the opinions of Mr Green and Rick van Baaren about tipping
课时作业(十八)
Ⅰ.单项填空
1．C句意为：到他认识到已经中计的时候，再做任何事情也就不济于事了。根据句意，可知本句讲的是现在的事情，故用现在时，排除B、D两项，本句强调“已经中计”，用完成体，故答案为C。
2．D a failure一个失败者；end in failure以失败告终。
3．A随着年龄的增长，你会获得更多经验。
4．A be/get caught in是固定搭配，指“突然碰上；突然遭受”，多用于被动结构。
5．C整个地区被大雪封闭了。cut off使(人、城镇、地区)封闭孤立。
6．D A、B项为及物动词，不符合题意，manage不符合题意；react回应。
7．C根据前面的looked here and there判断，我们的老师“好像”在找东西，所以用as if。
8．C考查时态和语态。根据这两个学生现在正站在老师办公室门口，可知现在正在受罚，从而推断在课上小声说话发生在过去。
9．B考查形容词辨析。particular挑剔的。be particularabout对……挑剔的。special特殊的，特别的，专用的；unusual不同寻常的，独特的；especial特别的，特殊的。
10．D考查倍数的表达和省略。根据句子所要表达的含义，but后补充完整为：but is three times as expensive as ours/our apartment。
11．B考查would rather的用法。would rather意为“宁愿，宁可”，后接动词原形，故选B。
12．B考查短语辨析。cut off切断。句意为：由于修路，电流被切断了，整座大楼一片漆黑。cut up切碎；cut out切去，省略，停止；cut down砍倒，削减，删节。
13．A lead/live a simple/easy/hard life过……生活，当life有定语修饰时，前面要用a 限定；make a/one’s fortune＝make money发财致富。
14．B考查介词的用法及非谓语动词的用法。介词by表程度，reaching短语在句中作结果状语。不定式也可作结果状语，但常与only或just连用，表示一种意想不到的结果。
15．B only to do sth.表示意想不到的结果。
Ⅱ.完形填空
【语篇解读】这是一篇记叙文。圣诞节前夕，Carl Fenter到处寻找玉米粉蒸肉，终于在一家店找到了玉米粉蒸肉。等待的时候，他在寒风中脱下自己的外套给一个同样在等待的母亲穿上，而这一善举使他得到了回报：这位女士后来专程给他家送去了他要买而没买到的玉米粉蒸肉。
1．B从语境的连贯判断选B，Carl Fenter说，家里是温暖的，可是在这里，早晨的寒风冷得很不正常。
2．A在这寒冷的日子，晚上在教堂做完圣诞节前夕的礼拜后回家和家人一起享受玉米粉蒸肉的盛宴，这样的点子或想法应该用brilliant来描述。a brilliant idea：绝妙的想法/主意。
3．A从语境的连贯看，本题用were：谁能想到，城里的玉米粉蒸肉在圣诞节前夕都卖完了呢？可是这些玉米粉蒸肉的确被卖完了。
4．B在几家店铺都没有买到玉米粉蒸肉，而他下定决心一定要买一份带回家，于是他开车跑遍了El Paso，并来到这最后一家卖玉米粉蒸肉的店铺。
5．D语境提到“45分钟之后，从锅上下来”，可见此处表示这家店铺的玉米粉蒸肉再过45分钟就能出锅了，用(be)due表示“预期发生”。
6．C这里用take one’s place表示“就位，就座”：于是，他在人群后面开始排队等候购买。
7．D从语境的连贯判断选D，remove“移开，脱下，去掉”：他注意到，在他前面的那位女士把自己的外套脱下来，给自己冻得发抖的孩子披上。
8．C没过多久，这位母亲自己也冻得瑟瑟发抖。这里用shake表示“发抖”，与前面的shivering呼应，而freeze表示“冻僵”，不符合语境叙述的排队买东西的场景。
9．C从语境和选项判断选C“犹豫，迟疑”：看见这番情景，Carl Fenter迟疑片刻，将自己的外套脱下来，递给这位母亲。
10．A面对这样的情景，这位母亲当然是非常感激，而不是B.让人尊敬的C.绝望的D.羞愧的。
11．A当队伍开始向前移动(玉米粉蒸肉终于出锅了)，微笑的人们带着热腾腾的玉米粉蒸肉走出店铺，他们一起欢呼雀跃。
12．D前面的人群终于散尽，轮到他购买了。
13．D他走进店铺，向柜台慢慢地挪过去。shoulder one’s way挤着(人群)前进，force one’s way用力挤过去，feel one’s way摸索着走，inch one’s way小心地、慢慢地挪动。显然这里选D表示慢慢地往前挪动，符合人们排队买东西时的场景。
14．B他在寒风中排队等待了很长时间，轮到他买的时候，玉米粉蒸肉却卖完了，此时的他当然很沮丧，因此选B。No way用来表示惊讶或不相信，意为“不会吧！不可能！”。
15．A他后面还有人在排队，因此选A。他在抱怨的时候，身后其他排队等候的人也跟着一起抱怨。line up“排除等待”，符合语境。wait up一般指“熬夜等待”。
16．B此处表示转折含义，虽然这一炉玉米粉蒸肉卖完了，可是你要是再等两个小时，还有最后一炉。
17．C表示“在多长时间之后”用介词in。
18．C从下文可知，他还要回教堂悬挂传统的圣诞灯，因此用have to表示“不得不，必须”。
19．A这个女士对他先前的帮助心存感激，因此选A，“至少我能为你做这点事(报答你)”。
20．B从故事情节的发展看，本题选B表示“恰好，确切地，准确地”：正好在圣诞前夕的中午，那位女士把玉米粉蒸肉给他家送来了。A、D项语序不对，C项“准确地，精密地”。
Ⅲ.阅读理解
【语篇解读】本文通过对几个研究的描述，介绍了消费者付小费的多少会受到哪些因素的影响。
1．D由第二段第二、三句可知，除服务本身外，侍者的语言选用、举止、账单的数目甚至侍者自己提醒消费者应付多少小费，都会影响消费者最终付小费的额度。
2．C由第四段最后一句可知答案。
3．D由倒数第二段可知，账单数目越大，小费比例越小，当账单达到$100以上时，小费比例基本稳定。由此可知D项正确。
4．D本文通过几个研究的结果来告诉我们影响付小费额度的因素，由此可知，作者对两位研究人员的研究成果是支持的。
第一课件网
六年级英语下册Unit 1 作业单 一、写出相应的单词 更强壮的更矮的更高的年龄更大的更年轻的 ________ ________ ________ ________ ________ 更大的更重的更长的更瘦的更小的 ________ ________ ________ ________ ________ 二、按要求写单词 tall(反义词)_____ strong(比较级)____older(反义词) _____funnier(原形)______ heavy(比较级)_____ thin(比较级)_______ bigger(原形)______ long(比较级)_____ 三、根据中文完成句子 1. 我比我的弟弟大三岁. I'm than my brother. 2. 这棵树要比那棵树高. This tree than that one. 3. 你比他矮四厘米. You are than he. 4. 谁比你重? than you. 5. 他比你更强壮. He is than you. 四、将句子补充完整 1. 我比你瘦。I am ___ ___ you . 2. 今年他两岁了。He is two_____ ____this ___. 3. 你比我高吗？____ you ____than ___? 4. 你喜欢哪只猴子呢？———monkey ___you like ? 5. 我的手比你的手大。My hands are ___than ___. 五、根据要求对句子进行变换 1. His friend is 145 cm tall.(对划线部分进行提问） __________________________________________________ 2. I am 45 kg.(对划线部分提问） __________________________________________________ 3. She is 12 years old .(对划线部分提问） __________________________________________________
课时作业(十一) 1．在等差数列{a n }中，已知a 1＝2，a 2＋a 3＝13，则a 4＋a 5＋a 6等于( ) A ．40 B ．42 C ．43 D ．45 答案 B 解析 ∵a 2＋a 3＝13，∴2a 1＋3d ＝13.∵a 1＝2，∴d ＝3. 而a 4＋a 5＋a 6＝3a 5＝3(a 1＋4d )＝42. 2．在等差数列－5，－312，－2，－1 2，…中，每相邻两项之间插入一个数， 使之组成一个新的等差数列，则新数列的通项公式为( ) A ．an ＝34n －23 4 B ．an ＝－5－3 2(n －1) C ．an ＝－5－3 4(n －1) D ．an ＝5 4 n 2－3n 答案 A 解析 首项为－5，公差为－312＋52＝3 4， ∴an ＝－5＋(n －1)·34＝34n －23 4 . 3．若a ，b ，c 成等差数列，则二次函数y ＝ax 2＋2bx ＋c 的图像与x 轴交点的个数是( ) A ．0 B ．1 C ．2 D ．1或2 答案 D 解析 ∵a 、b 、c 成等差，∴2b ＝a ＋c . ∴Δ＝(2b )2－4ac ＝(a ＋c )2－4ac ＝(a －c )2≥0.
4．数列{an }中，a 1＝15,3an ＋1＝3an －2，那么该数列中相邻两项的乘积为负数的是( ) A ．a 21和a 22 B ．a 22和a 23 C ．a 23和a 24 D ．a 24和a 25 答案 C 解析 由3an ＋1＝3an －2可知{an }为等差数列，又a 1＝15， ∴an ＝15＋(n －1)·(－23)＝－23n ＋473＝47－2n 3. 令an ·an ＋1<0，即47－2n 3· 47－n ＋ 3<0. 可得452
《Unit 2 Healthy eating Grammar & Writing》Ⅰ.用适当的情态动词完成下列句子
Thank you for your letter. I don't think I 1.________ give you any advice. I don't think the manager 2.________ trust you. It sounds as if he has decided that you 3.________ be the thief. Do you have to continue working at this company? Maybe you 4.________ find another job where the people are friendly. I think you 5.________ enjoy that more. If you stay at the meat factory, you 6.________ not be able to be happy. Besides, if you stay, the thief 7.________ do something bad to you. I don't think that 8.________ be very pleasant. If he played a trick on you, the manager 9.________ say you were the thief and call in the police. That 10.________ have serious results. I think the best thing you 11.________ do now is to look for another job and hope that it 12.________ turn out better. Yours sincerely， Mike 答案：1.can 2.will 3.must 4.should/ought to/can/need 5.may/might/will 6.will 7.may/will/might 8．will 9.might/would 10.may/will/might 11．can/should/ought to/need 12.will/would Ⅴ.阅读理解 Today fast food restaurants are very popular. One famous name is Harry's Hamburgers. Harry's Hamburgers come from America and have been in business for thirty years. There are about 5,000 Harry's Hamburgers in different countries. The food is the same everywhere. In London, New York or Paris people eat the same hamburgers and drink the same drinks. Hamburger Harry is a special friend of children everywhere. He goes to schools and talks to pupils. He goes into different classrooms, sits down on the carpet or at the desk and asks the pupils to relax. Then he begins his talk. Harry teaches children about litter. “Don't throw your boxes on the floor in my restaurants，” he says. “And don't throw my bags away in the street. If you see boxes and bags in the street, pick them up and throw them into the bin (垃圾箱)．” Hamburger Harry visits children in hospitals and tells them funny stories. His restaurants give wonderful birthday parties. Parents telephone the restaurant or go there. They choose a good day for the party, arrange the food and drink and send invitations to friends. Hamburger Harry sometimes comes to the party with a bag of presents and a big birthday cake. The boys and girls sit round the tables and eat all their favorite food. They all wear paper hats and party badges(徽章). Hamburger Harry dresses in green, red and yellow and he wears two big badges. He works hard at the party. He tells jokes, sings songs and gives everyone a present. The children get colored pencils, balloons and books to draw on. They always have a good time. Their parents enjoy the party too because they don't prepare the tables and they don't cook the food. They don't have to clean the restaurant after the party. All they do is pay the bill. 1．Harry's hamburgers are sold ________. A．without drinks B．at a high price C．in the same style D．with different tastes 2．If a child holds a birthday party at Harry's restaurant, Harry may ________. A．give a big cake to the child as a gift B．ask his workers to sing for the child C．play a joke on the child for fun D．decorate the restaurant with balloons
·课时精练 ◆Welcome to the unit (单元导入) 一、翻译下列短语。 1. be afraid of sth. _________________ 2. have to go down _________________ 3. a path between hills ________________ 4. in the north of China __________________ 5. five miles away from here __________________ 6. 认识路_________________ 7. 乘公交车去那儿________________ 8. 肯定，确信，有把握__________________ 二、根据课本上的对话完成下面的小短文。（每空一词） Hobo and Eddie goes on a 1 . But Eddie 2 know the way, so Hobo asks Eddie to 3 him. And Hobo says he is 4 about the way. First, he asks Eddie to go 5 , but Eddie is very 6 . When they go down, Hobo finds it’s a 7 way. So they 8 to go up again. How unlucky! 1. __________ 2. __________ 3. _________ 4. __________ 5. __________ 6. __________ 7. _________ 8. __________ 三、按要求变换句型。（每空一词） 1.We can go to the zoo by bus. (划线提问) ________ _________ ________ go to the zoo? 2. Come with me, please. (改写同义句) ________ ________ , please. 3. Sunny Garden in north-west of the zoo. (划线提问) ________ Sunny Garden? 4. You’d better go there by bike. (改写同义句) (1) You’d better ________ ________ ________ there. (2)You’d better g o there _______ our bikes. 5. Shall we take a taxi? (改写同义句) ________ ______ going _______ ________? 四、用所给动词的适当形式填空。 1. Will you ____________ me to my home? 2. _________ afraid of the dog. He is our friend. 3. I __________ for some football cards with Tom now. 4. We don’t ___________ to finish the work today. We can do it until tomorrow. 5. The place is far from here. I think we can _____________ there by train. ◆Reading (课文阅读) 一、根据首字母、音标、中英文提示及句意完成句子。 1. ----Which month __________ February? ----March. 2. Tree _____________ turn yellow in autumn. 3. B___________ is pandas’ favourite food. 4. It’s ____________ (危险)for you to play football in the street.
Unit One Class____________ Number___________ Name_________________ Score______________ 1. The Labor Party’s electoral strategy, which was based on a tactical (战术的)_______with other smaller parties, has proved successful. 2. My brother was not badly hurt, but he injured his leg and had to _______around for a few weeks. 3. The New York fire fighters’____deeds in rescuing the September 11 victims were celebrated across the country. 4. By a _______of good luck, Carol, who had been buried in the rubble for more than 20 hours, came out alive. 5. The aircraft was subjected to a test of temperatures of ________ 65 degrees Celsius and plus 120 degrees. 6. Tax incentives will be used to attract companies to the western ______of our country away from the east coast. 7. The opening speeches sounded more like______of war than offerings of peace. 8. After a three-day ______ by the police, the terrorists who had seized the restaurant had to give in. 9. China is the largest country in the world population. 10. In spite of all the difficulties, we should with our efforts to win the negotiation. II. Multiple choice Choose the one that best completes the sentence from the four choices given. (40%) 11.In 1941, Adolf Hitler, leader of Nazi Germany, ____ an attack against the Soviet Union, as Russia then was called. A. sent B. did C. got D. launched 12. They should hire a more accountant than the one they currently have. A. effective B. sufficient C. efficient D. respective 13. “____” by the invasion, Soviet leader Joseph Stalin instructed the Russian people to “scorch the earth” in front of the German invaders. A. caught guard B. caught off C. caught up with D. caught off guard 14. The manufacturers had to raise their prices because of the increase in the cost of materials. A. raw B. original C. rough D. primitive 15. Napoleon ____ pressing on to Moscow, 448 kilometers away. A. took over B. took the gamble of C. took out D. took in 16.In the spring of 1812, Napoleon ____ an army of six hundred thousand men on the borders of Russia. A. assembled B. got C. owned D. together 17. By_____ Mr. Chen is a taxi driver. A. profession B. work C. occupation D. employment 18. It does not change the fact that she was the doctor ______ for the failure of the operation. A. guilty B. obliged C. accounting D. responsible 19. The shock of her daughter’s death ______ her unable to remain calm. A. caused B. had C. enabled D. rendered 20. The basic aim of the establishment of this institution is the _____ of H7N9. A. fight B. conquest C. treatment D. work III. Reading comprehension (20%) Road courtesy(礼貌) is not only good manners, but good sense too. It takes the most levelheaded and good tempered of drivers to resist the temptation to get their revenge when subjected to uncivilized behavior. On the other hand, a little courtesy goes a long way towards relieving the tensions and frustrations of motoring. A friendly nod or
课时作业3等差数列的概念和通项公式 时间：45分钟满分：100分 一、选择题(每小题5分，共35分) 1．已知数列{a n}的通项公式为a n＝2 011－2 012n，则此数列() A．是首项为2 011的等差数列 B．是首项为－1且公差为2 012的等差数列 C．是公差为2 011的递增等差数列 D．是首项为－1且公差为－2 012的递减等差数列 【答案】 D 【解析】a1＝－1，a n＋1－a n＝[2 011－2 012(n＋1)]－(2 011－2 012n)＝－2 012<0.故选D. 2．已知在数列{a n}中，a n＋1－a n＝2，且a1＝2，则这个数列的第10项为() A．18B．19 C．20 D．21 【答案】 C 【解析】由条件知{a n}是公差为2的等差数列，故a10＝a1＋9d ＝2＋9×2＝20. 3．在等差数列{a n}中，a1＋a5＝10，a4＝7，则数列{a n}的公差为() A．1 B．2 C．3 D．4 【答案】 B
【解析】∵a1＋a5＝10＝2a3， ∴a3＝5.故d＝a4－a3＝7－5＝2. 4．在等差数列{a n}中，a1＋a9＝10，a2＋a10＝14，则a4的值为() A．3 B．6 C．8 D．10 【答案】 A 【解析】由a1＋a9＝10，a2＋a10＝14得d＝2， ∵a1＋a9＝2a1＋8d＝10， ∴a1＝－3，∴a4＝－3＋3×2＝3. 5．已知递增的等差数列{a n}满足a1＝1，a3＝a22－4，则a n＝() A．2n B．2n－1 C．n－1 D．2n＋1 【答案】 B 【解析】设等差数列{a n}的公差为d(d>0)． 由a3＝a22－4得a1＋2d＝(a1＋d)2－4，即1＋2d＝(1＋d)2－4，d2＝4.又{a n}是递增数列，所以d＝2， 故a n＝a1＋(n－1)d＝1＋(n－1)·2＝2n－1. 6．设S n是数列{a n}的前n项和，且S n＝n2，则{a n}() A．是常数列B．是等差数列 C．是摆动数列D．非以上三种数列 【答案】 B
七年级上册英语unit2课时作业练 习 第1课时(Section A 1a-2d) 一、根据句意及首字母提示完成单词。 1.My father’s mother is my g. 2.My father’s father is my g. 3.My father’s sisters are my a. 3.My father’s sisters are my 4.Li Ming is my f.He is 10 years old. 4.Li Ming is my 5.She is my s. 二、选词填空。 his parents apples grandmother those 1.My father and my mother are my . 2.This is my https://www.doczj.com/doc/5414867820.html, is Jack. 3.What are these? They are . 4.are my sisters. 5. Your mother’s mother is your . 三、用this，that，those或these填空。
1.is a ruler and is a pen. 2. –Are your friends? --Yes，they are. 3.—Are your cups? --No. These are her cups. 4.Dad，is my friend ，Kate. 5.—What’s over there? --It’s a school. 第2课时（Section A Grammar Focus –3c） 一、用be动词的适当形式填空。 1.I eleven. 2.-Is this your ball? --Yes ，it . 3.Who they? 4.“I”an English letter or an English word. 5.Here two red apples. 二、单项选择。 （）1.There are three in the basketball. A.potato B. book C.toy D. apples （）2.My mother gives a nice toy bike for my birthday. A. I B. me C. my D. mine
Period Two Language Points Ⅰ.语境填词 1．They built a rough ________ (避身处)from old pieces of wood. 2．That balloon will ________ (爆裂)if you blow it up any more. 3．Many people were killed or ________(受伤) in the traffic accident. 4．The dog ________ (埋藏) its bone in the garden. 5．After the big fire，the house lay in ________(废墟)． 6．Although he knew Mary had cancer，the news of her death still came as a ________(令人震惊的事)． 7．Hundreds of people are still in the water，waiting to be ________(援救)． 8．They were ________(使陷入困境) in the burning building. 9．The whole town was completely ________(摧毁) owing to the terrible earthquake. 10．The World Expo in Shanghai is an ________(大事) in Chinese history. Ⅱ.选词填空 1．He was a warm－hearted and hard－working boy，and ________________________________________ by his classmates. 2．Years of fighting have left the area ______________. 3．If war breaks out，we shall be called up ________________. 4．Failing again doesn’t mean that the world is ________________. 5．He ________________ learning English. 6．Eighty percent of the people trapped in the ruins ________________ at last. Ⅲ.词义辨析 1．用wound，harm，hurt或injure的适当形式填空 (1)The bullet ________ his arm. (2)Two people have been badly ________ in the accident. (3)These criticisms have ________ his pride deeply. (4)Don’t ________ your eyes by reading in dim light. (5)My chest ________ when I take a deep breath. 2．用rise，raise或lift的适当形式填空 (1)Hearing the old man’s report，the officer ________ from his seat and said something must be done to ________ people’s living standards. (2)The price of tomatoes has ________ recently. (3)The price of tomatoes has been ________ recently. (4)After graduation he ________ pigs to support his family. (5)This suitcase is too heavy for the child to ______. (6)The sun ________ in the east and sets in the west. Ⅳ.单项填空 1．This is really a heated debate.________ the game? A．Which side do you think will win B．Whom do you think will win C．Do you think which side will win D．Do you think whom will win 2．Someone called me up in the middle of the night，but they hung up ________ I could
八年级下册unit 1 作业 一、单项选择 ( )1. What’s wrong _____ John? A. with B. to C. for D. on ( )2. What’s _____ with you? A. the wrong B. trouble C. matter D. the matter ( )3. “What’s wrong with you?”“I don’t feel _____.” A. good B. well C. illness D. sadly ( )4. He is _____ heavy because he eats _____ sugar. A. too much … too much B. too much … much too C. much too … much too D. much too … too much ( )5. If you have a _____, you should go to see a dentist. A. headache B. stomachache C. toothache D. sore throat ( )6. The old man has _____. A. only three tooths B. three only tooths C. only three teeth D. three only teeth ( )7. “ What’s the matter with you?”“ I have _____.” A. a sore throat B. sore throat C. a throat sore D. throat sore ( )8. Open your _____ and say “Ah”. A. nose B. mouth C. eye D. hand ( )9. There is something wrong with my _____. I can’t see
课时作业(二) 1．在△ABC中，a＝2b cos C，则这个三角形一定是() A．等腰三角形B．直角三角形 C．等腰直角三角形D．等腰或直角三角形 答案 A 2．已知△ABC中，AB＝3，AC＝1，且B＝30°，则△ABC的面积等于() A. 3 2 B. 3 4 C. 3 2或 3 D. 3 4或 3 2 答案 D 3．在△ABC中，a＝15，b＝10，A＝60°，则cos B＝() A．－22 3 B. 22 3 C．－ 6 3 D. 6 3 答案 D 解析依题意得0° 解析 由正弦定理a sin A ＝b sin B ，得1sin A ＝3 sin B . 又∵B ＝2A ，∴1sin A ＝3sin2A ＝3 2sin A cos A . ∴cos A ＝3 2，∴∠A ＝30°，∴∠B ＝60°，∠C ＝90°. ∴c ＝12＋(3)2＝2. 5．(2013·陕西)设△ABC 的内角A ，B ，C 所对的边分别为a ，b ，c ，若b cos C ＋c cos B ＝a sin A ，则△ABC 的形状为( ) A ．锐角三角形 B ．直角三角形 C ．钝角三角形 D ．不确定 答案 B 解析 ∵b cos C ＋c cos B ＝a sin A ，由正弦定理，得sin B cos C ＋sin C cos B ＝sin 2A ，∴sin(B ＋C )＝sin 2A ，即sin A ＝sin 2A . 又∵sin A >0，∴sin A ＝1，∴A ＝π 2，故△ABC 为直角三角形． 6．在△ABC 中，角A 、B 、C 所对的边分别为a 、b 、c ，已知A ＝60°，a ＝3，b ＝1，则c 等于( ) A ．1 B ．2 C.3－1 D. 3 答案 B 7．已知△ABC 的面积为3 2，且b ＝2，c ＝3，则( ) A ．A ＝30° B ．A ＝60° C ．A ＝30°或150° D ．A ＝60°或120° 答案 D 8．已知三角形面积为1 4，外接圆面积为π，则这个三角形的三边 课时作业(三十二) Unit 2 Robots Ⅰ.用所给词的适当形式填空 1.The superstar showed up at the court，________(accompany) by his manager. 2.The young lady dressed________(elegant) when she went to work. 3.He was right in his________(assess) and wrong in his prediction. 4.He is an________child.He always________his parents and never________rules in school or laws in society.(obey) 5.Everyone knows she is a________girl who has a________for singing.(talent) 6.It________in his________that the country was in a messy________.(state) 7.To the________of the boss，his products could________the need of the customers.(satisfy) 8.The old blind man asked me to do him a________and find his________book.(favour) 9.It is reported that the lost boy________(not find)so far. 10.Having a trip abroad is certainly good for the old couple，but it remains________(see) whether they will enjoy it. 答案：1.accompanied 2.elegantly 3.assessment 4.obedient；obeys; disobeys 5.talented; talent 6.was stated; statement; state 7.satisfaction; satisfy 8.favour；favourite 9.hasn't been found 10.to be seen Ⅱ.完成句子 1.John__________________(极其渴望)to become a writer of the science fiction. 2.__________________(据宣布)the new library which is under construction would be opened to the public next year. 3.His father isn't__________________(支持)his thought while his mother always__________________(陪他去书店)． 4.Do your parents often__________________(打电话)to ask your recent progress？ 5.__________________(且不说费用多少)，do we actually need a second car？ 6.Owing to his hard work，his classmates all think John__________________(注定会成功)． 7.I'm about to__________________(转身)and see who he is but my phone rings. 8.Her only fear was that her little son would______________(让……一个人留下)in the world in case something happened to her. 必修四Unit4课时作业Ⅰ Ⅰ.单词拼写 1．The dog ___ communicates _____(传递) its fear to the other animals. 2．Can you g__ guess ______ what he will buy for you on your birthday? 3．Deaf people often use sign language as a means of c__ communication ______. 4．The Prime Minister is to make a_ statement _______(声明) tomorrow. 5．He __ represented ______(代表) our class making a speech at the meeting. 6．When the fierce dog _ approached _______(靠近) her，she hid herself behind the door. 7．I don’t think that we should be seen traveling t ogether—people might m__ misunderstand 8．There was an e__ expression ______ of danger on her face. 9．The boy is very __ curious ______(好奇的) and he is always asking questions. Ⅱ.翻译句子 1．Tian’anmen Square looks even more beautiful __ with all lights on ____(所有的灯都亮着)． 2．Do you know the man __ wearing a white shirt __ (穿白衬衣的人)? 3．He has experience ____ as well as knowledge _____(也有知识)． 4．They stood there for an hour，__ watching the match ____(观看比赛)． 5．The famous professor came in，__ followed by a group of students _ (后面跟着一群学生)． 6．外国朋友对中国商业的发展很好奇。 The foreign friends are very ___ curious about __ the __ development of business __in China. 7．他不喜欢晚上外出，我也不喜欢。 He doesn’t like to go out in the evening, __ neither do __I. 8．我不喜欢他和他父母说话的方式。 I don’t like the way _ that/in which __ he speaks to his parents. 9．你所说的不太可能与你所做的一样。 What you say is not _ likely to __be the ___ same as _ what you do. Ⅲ.单项填空 1．Children are always curious ________ the unknown world. A．forB．toC．of D．about [解析]be curious about为固定搭配，意为“对……感到好奇”。[答案] D 2．He avoided ________ his opinion on the subject. A．to give B．givingC．give D．gave [解析]avoid后接名词或动名词，不能接不定式。[答案] B 3．The ________ manager of our company told us to read the article and get a ________ idea. A．general; general B．general; opinionC．chief; whole D．/；/ [解析]general manager意为“总经理”；general idea意为“大意”。[答案] A 4．The teacher said that we could ________ ourselves at the class meeting. A．express B．thinkC．offer D．suggest [解析]只有express可以放在句中与ourselves搭配，表示“畅所欲言”。[答案] A 5．Shakespeare was ________ a musician ________ a writer. A．not; but B．both; andC．neither; nor D．either; or [解析]莎士比亚是世界名人，人们都知道他不是音乐家而是剧作家。[答案] A 6．Your story ________ his in everything ________ small details. A．agrees with; except B．agrees to; besidesC．agrees; except D．agrees on; besides [解析]此处agree with意为“与……一致”。全句意为“你的故事和他的一样，只是有些小细节不同”。[答案] A 7．She sat in a chair，________ the letter and ________ herself. A．to read; smile B．read; smilingC．reading; smiling D．to read; to smile [解析]句中两个空格内的动词均为现在分词作伴随状语。[答案] C 8．After graduation they still ________ touch with each other ________ sending e-mails.高考英语一轮复习 Unit2 Robots课时作业 新人教版选修7
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