河北省2019年中考英语二轮复习第二篇语法突破篇语法专题01名词语法综合演练

(九)动词的时态和语态Ⅰ.单项填空。

动词的时态(B)1.—Hi，Wang Ning！How's the weather in Jinan now?—It is terrible.It ________ all the morning.A．rains B．is rainingC．rained D．will rain(A)2.—What does your sister like doing in her free time?—She ________ watching TV.A．likes B．likedC．has liked D．had liked(C)3.Do you know if________ back next week？If he ________ back，please let me know.A．he comes；will comeB．will he come；comesC．he will come；comesD．will he come；will come(C)4.—May I see Mr.Lin，please?—Well，I'm afraid he's not in at the moment.I think he ________ back soon.A．came B．has comeC．will be D．was(D)5.Look at those big black clouds.It ________ rain.Let's hurry.A．must B．willC．would D．is going to(B)6.—My daughter ________ her driving test yesterday.—Congratulations.She had practiced driving really hard.A．passes B．passedC．has passed D．had passed(C)7.—Your e­mail address again？I ________ quite catch it.—Hu123@.A．don't B．can'tC．didn't D．won't(B)8.—Oh，Mrs.King，your necklace looks nice.Is it new?—No，I________ it for two years.A．had B．have hadC．bought D．have bought(A)9.—________ to the United States?—No，never.But I went to Canada a few years ago.A．Have you ever been B．Have you goneC．Did you go D．Will you go(D)10.—Are Li Yan and Wang Mei still living in Ningbo?—No，they ________ to Sh anghai.A．had moved B．movedC．will move D．have moved(C)11.—Do you know the man over there?—Yes.I________ him several times since last month.A．see B．sawC．have seen D．had seen(D)12.—What do you think of my answer to the question?—Sorry.What's that？I________ about something else.A．thought B．am thinkingC．have thought D．was thinking(D)13.—Amy，I cal led you yesterday evening，but nobody answered the phone.—Oh，I ________ a walk with my mother at that time.A．take B．tookC．am taking D．was taking(B)14.—What is the weather like today?—It is cloud y.And I thin k it ________.A．was raining B．is going to rainC．is raining D．rained(A)15.—Tom，________ you ever ________ that new film?—Yes.I ________ it a week ago.A．have；seen；sawB．have；seen；seeC．do；see；seeD．had；seen；saw(C)16.It ________ over sixty years since the People's Republic of China was founded.A．was B．had beenC．is D．will be(B)17.Don't make any noise.We ________ to a piece of wonderful music at the moment.A．will listen B．are listeningC．listen D．have listenin g(A)18.—I saw her smoking in the restaurant yesterday afternoon.—But she seldom________.A．smokes B．had smokedC．smoked D．is smoking(C)19.—How do you like your school，Feifei?—Quite good.The number of students her e ________ year by year.A．increased B．was increasingC．is increasing D．are increasing(B)20.—Has your sister finished her report?—Sorry，I don't know.She ________ it this morning.A．is writing B．was writingC．writes D．has written(B)21.—Why are you in such a hurry，Mike?—There ________ an NBA game in ten minutes.A．will have B．will beC．is going to have D．are going to be(C)22.—Jenny wants to know if you ________ a hiking trip tomorrow.—Of course we will.But if it ________，we'll visit the Space Museum instead.A．will go on；will rain B．go on；rainsC．will go on；rains D．go on；will rain(B)23.—What's that terrible noise?—The neighbors ________ for a party.A．have prepared B．are preparingC．prepare D．will prepare(D)24.—When did the meeting begin?—At four o'clock.It ________ for 15 minutes.A．was on B．beganC．has begun D．has been on(D)25.—Li Kai，hand in your homework，please.—Oh，sorry.I ________ it at home this morning.A．was leaving B．have leftC．leaves D．left(A)26.—Where ________ you ________ lunch?—At home.There was no school lunch.A．did；have B．are；havingC．will；have D．do；have(A)27.Henry will give us a report as soon as he ________．A．arrives B．arrivedC．is arriving D．will arrive(B)28.Tony ________ football every weekend when he was young.A．plays B．playedC．is playing D．has played(C)29.We have no more vegetables in the fridge.I ________ and buy some.A．go B．wentC．will go D．was going(C)30.Julie's father ________ to London last month.He ________ there three times.A．went；had gone B．has gone；has beenC．went；has been D．has been；had gone(D)31.—I didn't see you at the meeting yesterday.Why?—I ________ for an important telephone call at that moment.A．wait B．waitedC．am waiting D．was waiting(A)32.—We all went to the cinema except you last night.Why didn't you come?—Be cause I ________ that movie twice.A．have watched B．had watchedC．was watching D．would watch动词的语态(C)33.Students ________ not to use mobile phones in our school now.A．ask B．askedC．are asked D．were asked(C)34.—Dad，please open the door.It ________.—OK，dear.I am coming.A．locks B．lockedC．is locked D．was locked(D)35.—How often do I need to feed the dog?—It ________ food every day，or it will be hungry.A．must give B．must be giveC．must gave D．must be given(B)36.I believe that those mountains ________ with trees in a few years.A．are covered B．will be coveredC．are covering D．will cover(B)37.—Did you go to Jim's birthday party?—No，I ________.A．am not invited B．wasn't invitedC．haven't invited D．didn't invite(C)38.We ________ to start at once，or we will miss the train.A．tell B．have toldC．are told D．told(C)39.—When ________ the car ________？—Sorry，I don't know.A．does；invent B．did；inventC．was；invented D．was；inventing(C)40.—Do you have any problems if you ________ this job?—Well，I'm thin king about the working time.A．offer B．will offerC．are offered D．be offered(B)41.The dragon boat race ________ every year on the Dragon Boat Festival in southern China.A．holds B．is heldC．will hold D．will be held(C)42.The gifts________ by my friends yesterday.A．are bought B．is broughtC．were bought D．was bought(C)43.—I ________to make a decision for myself.What should I do?—If I ________you，I'd talk with my parents.A．don't allow；amB．won't allow；wasC．am not allowed；wereD．weren't allowed；be(B)44.Paul________ enter Mr.Smith's house just now.A．saw to B．was seen toC．was seen D．saw(C)45.Your application won't________ until you complete the survey.A．accepts B．receiveC．be accepted D．be received(B)46.—Food safety is very important.—So some rules________ to stop people from polluting food.A．make B．must be madeC．must made D．be made(B)47.Please don't stand up in class until you ________.A．were told to B．are told toC．were told D．are told(C)48.A talk on American culture________ in the school hall yesterday afternoon.A．gave B．will giveC．was given D．will be given(D)49.—God，your classro om is so dirty.—We were busy getting ready for the final exam last week.It ________.A．hasn't cleaned B．didn't cleanC．was clean D．wasn't cleaned(D)50.Many houses ________ in that earthquake.A．is destroyed B．are destroyedC．was destroyed D．were destroyed(D)51.—What languages ________ in that country?—German and English.A．are speaking B．is spokenC．is speaking D．are spoken(D)52.—John，your room is really in a mess.It needs ________．—Sorry，Mom.I'll do it at once.A．clean B．cleanedC．to clean D．to be cleaned(B)53.Each year quite a lot of food ________ around the world.It's really time for us to do something.A．are wasted B．is wastedC．wasted D．will be wasted(C)54.—You bought a new car！An American car?—No，a Chinese car.It ________ in Changchun.A．makes B．madeC．was made D．will be madeⅡ.根据句意，用括号中所给词的适当形式填空。

语法专题（八）系动词和情态动词语法综合演练1.[2018·黔南] You write the report again because spelling mistakes are not allowed at all.A.mayB.canC.mustD.could2.[2018·荆州]—Can we walk across the road now?—No, we . We have to wait until the light turns green.A.co uldn’tB.needn’tC.shouldn’tD.mustn’t3.[2018·株洲改编]You look so weak! I think you go to see a doctor at once.A.mightB.shouldC.couldD.may4.[2018·上海]—Must I do the project on my own?—No, you . You can work with your classmates.A.needn’tB.can’tC.shouldn’tD.mustn’t5.[2018·资阳]— I have a talk with you now?—Sorry, I’m quite busy.A.WillB.MustC.MayD.Need6.[2018·重庆] You stop when the traffic lights turn red.A.can’tB.mayC.mustD.needn’t7.[2018·孝感]—Lucy is walking the dog in the park.—She be. Listen! She is singing loudly in her room.A.can’tB.mustn’tC.needn’tD.won’t8.[2018·苏州]She be slow, but at least she doesn’t make stupid mistakes.A.needn’tB.mayC.can’tD.shall9.[2018·武威]—Can we play soccer here?—No, you play it near the road. That’s too dangerous!A.canB.mayC.won’tD.mustn’t10.[2018·凉山] Parents put the things like knives and medicine away in the house to keep children safe.A.mayB.mightC.canD.should11.[2018·武汉]—Must you go?—Yes. I’m afraid I really.A.mayB.shouldC.mustD.can12.[2018·临沂] Could you please speak a little louder? I hear you very well.A.can’tB.mustn’tC.shouldn’tD.needn’t13.[2018·安徽]—May I watch TV, Dad?—When your homework is finished, you .A.shouldB.canC.mustD.need14.[2018·青岛] This book be Lucy’s. Look! Her name is on it.A.canB.mayC.mustD.might15.—Must I return the book now?—I’m afraid you according to the library rules. But you can renew it. A.need B.canC.have toD.may16.It’s said that there are plenty of hotels in that town. There be any difficulty for you to find somewhere to stay.A.wouldn’tB.shouldn’tC.needn’tD.mustn’t17.[2018·温州] The cheese cake so good that I can’t wait to eat it.A.tastesB.feelsC.soundsD.smells18.—Shall we go for a walk?— great.A.FeelsB.SoundsC.TurnsD.Looks19.—The cheese doesn’t good. Why don’t we go to buy some fresh cheese?—Sounds great!A.seeB.findC.soundD.taste20.The cloth very soft and comfortable.A.smellsB.tastesC.feelsD.sounds参考答案1.C2.D couldn’ t意为“不可以”;needn’ t意为“没必要”; shouldn’ t意为“不应该”;mustn’ t意为“禁止,不允许”。

语法专题（五）介词和介词短语语法综合演练Ⅰ.单项选择1.[2018·淮安] The World Cup Russia this year must be wonderful.A.onB.inC.atD.to2.[2018·阜康、米泉]She wants to learn more about American history. She is thirsty such knowledge.A.atB.aboutC.onD.for3.[2018·内江] The accident took place a cold November evening.A.onB.inC.atD.for4.[2018·百色] We go to school Monday to Friday every week.A.atB.forC.onD.from5.[2018·武威] The earth goes the sun.A.aroundB.throughC.betweenD.across6.[2017·天水]—Did you get WeChat Red（微信红包）the Spring Festival?—Yes. It’s actually the most popular way of sending traditional holiday presents now.A.withB.forC.duringD.after7.[2018·北京]Happy birthday, Peter! Here’s a gift you.A.forB.inC.withD.from8.[2018·盘锦] I like taking a walk the river after dinner.A.aboveB.onC.underD.along9.[2017·河南] Father brought his little boy to a concert. But he was too young to sit the whole concert.A.forB.withC.duringD.through10.[2018·河池] You can improve your English listening to English songs.A.byB.withC.forD.in11.[2018·唐山乐亭一模] Usually I finish my homework 10 o’clock, then I go to bed at once.A.untilB.forC.beforeD.in12.[2018·河南] I stopped the night in a small village while I was on holiday in the Himalayas a few years ago.A.atB.forC.untilD.through13.[2018·资阳] The river is very clear. We can even see the fish swimming it.A.inB.onC.toD.behind14.[2018·抚顺]—What do you like to do in your spare time?—I like collecting train tickets, and I have a collection of 100 now.A.in commonB.in totalC.in dangerD.in silence15.[2018·曲靖]Imagine you’re Yu Gong, what could you do moving the mountains?A.in the middle ofB.instead ofC.across fromD.up toⅡ.根据句意或首字母提示填空1.It’s polite to knock on the door b entering a room.2.China has a lot of fantastic sights, i the Great Wall, the Summer Palace and so on.3.The kind man helped the blind woman go a the street at the crossing.4.I’m afraid of the dark. That’s why I always go to sleep w the light on.5.Now Mom feels much better a taking the medicine.6.Steven’s exam results put him a the top students of the class.7.The restaurant is open every day e Monday. We can’t go there on Monday.8.The nice dress was bought by my uncle a birthday present.9.He didn’t get any help and had to complete the work his own.10.The twin sisters always listen to the teacher carefully and take notes the same time.参考答案Ⅰ.1.B表示“在某个国家”用介词in表达。

语法专题（七）动词的时态和语态语法综合演练Ⅰ.单项选择1.[2018·武汉] My sister the piano very well, but she hasn’t had time to play recently.A.will playB.has playedC.playedD.plays2.[2018·铜仁]—I will go to Guangdong for my summer holiday, Mom.—I will meet you when you the airport.A.will reachB.reachesC.reachedD.reach3.[2018·铜仁]—I called you at eight last night, but you didn’t answer. What were you doing?—I .A.took a showerB.was taking a showerC.take a showerD.have taken a shower4.[2018·梧州] We will go camping if it tomorrow.A.rainedB.doesn’t rainC.will rainD.won’t rain5.[2018·江西] We a party for Kate. It’s supposed to be a surprise.A.were havingB.hadC.will haveD.have had6.[2018·天水]—When will A Bite of ChinaⅢ begin tonight?—It for ten minutes.A.will beginB.has begunC.will be onD.has been on7.[2018·上海] The debate on whether to keep pets forty minutes yesterday afternoon.ststedC.will lastD.has lasted8.[2018·常州]—I you here, but you didn’t come.—I’m terribly sorry. I was so busy that I forgot.A.would expectB.was expectingC.am expectingD.have expected9.[2018·徐州] Linda was busy when I went to see her yesterday. She for an exam.A.will studyB.was studyingC.has studiedD.is studying10.[2018·抚顺] Tom is not here. He in the health club.A.is exercisingB.was exercisingC.exercisesD.exercised11.[2018·东营]There six countries in SCO （上合组织） at first, but now the number has increased to eight.A.isB.areC.wereD.will be12.[2018·咸宁]—High-speed trains, Mobile payment, Sharing bikes and Online shopping are called “four new great inventions” of modern China.—They our daily lives more convenient.A.have madeB.had madeC.have been madeD.made13.[2018·无锡]—It’s said that drinking cof fee cancer. Do I have to give it up?—Relax! Not everything on WeChat is true. In fact, a coffee a day keeps the doctor away.A.causesB.has causedC.causedD.had caused14.[2018·沈阳] Sarah many places of interest in Beijing already.A.visitedB.has visitedC.will visitD.visits15.[2018·长春] Nowadays, there more heroes in China. We admire them a lot.A.isB.areC.wasD.were16.[2018·广东]It is said that the number of forest parks in Guangdong to more than 1,000 so far.A.increaseB.increasedC.has increasedD.will increase17.[2018·上海] The film Operation Red Sea a lot of praise since its first show months ago.A.winsB.winC.will winD.has won18.[2018·河池] Each of us WeChat nowadays even the old people.A.playsB.playC.playingD.played19.[2018·黄石] More and more foreign students begin to learn Chinese, and many of them Chinese better and better now.A.are spokenB.spokeC.have spokenD.are speaking20.[2017·温州]Simon looks worried because he a writing competition and now he’s waiting for the result.A.entersB.enteredC.will enterD.is entering21.[2017·天津] The earth is a planet and it around the sun.A.goesB.goC.will goD.went22.[2017·随州]—Did you watch the football match on TV last night?—I wanted to, but my father his favorite TV program.A.watchedB.watchesC.was watchingD.had watched23.[2017·苏州]—Excuse me, what time does Flight BA 2793 leave?—Just a minute. I it for you.A.checkB.checkedC.will checkD.have checked24.[2017·潍坊] A little effort every day, you a big difference.A.makesB.madeC.have madeD.will make25.[2017·鄂州]—The town of Huarong a lot in the past five years.—That’s true. It’s becoming more and more beautiful.A.changedB.has changedC.had changedD.is changing26.[2017·武汉]—Linda is not coming for the party tonight.—But she !A.promisesB.promisedC.will promiseD.had promised27.[2017·河南]—Paul, I’m busy cooking. Can you give me a hand?—Just a minute. I my e-mail.A.am checkingB.will checkC.have checkedD.was checking28.[2018·石家庄新华区模拟] A good day! I visited the Summer Palace and a present.A.have gotB.getC.gotD.will get29.[2018·石家庄新华区模拟]Sorry, I didn’t know you the dictionary.A.are usingB.were usingedD.have used30.[2018·石家庄质检]Don’t put the glass there. Someone it.A.breaksB.brokeC.will breakD.has broken31.[2018·邯郸一模] You can ring me this evening. I at home.A.stayB.stayedC.will stayD.have stayed32.[2018·邯郸一模]Andy doesn’t want to see the film Coco because he it twice.A.seesB.is seeingC.will seeD.has seen33.[2018·唐山路南区二模]—What is the terrible noise?—The neighbors for a party.A.have preparedB.prepareC.will prepareD.are preparing34.Good news! Mr. Smith us a talk on American culture.A.gaveB.is givingC.has givenD.will give35.I my work. I can only go and play basketball with you tomorrow.A.don’t finishB.didn’t finishC.haven’t finishedD.won’t finish36.[2017·石家庄模拟] My little sister at home. I need to be with her.A.studiesB.studiedC.have studiedD.is studying37.[2017·邯郸模拟]I’m glad to hear you to a new house next week.A.moveB.movedC.have movedD.will move38.[2017·唐山模拟]—Excuse me, look at the sign NO SMOKING.—Sorry, I it. I will stop it at once.A.don’t seeB.won’t seeC.wasn’t seeingD.didn’t see39.[2017·唐山模拟] I it better if you give me another chance.A.doB.didC.will doD.am doing40.[2017·石家庄模拟] He looks tired. It seems he too much.A.practicesB.will practiceC.has practicedD.is practicing41.[2017·承德模拟] I Chinese dishes for my foreign friends. I think they may like it.A.will cookB.have cookedC.cookD.cooked42.[2017·石家庄模拟]—Why did the truck break into the building?—Because the driver on the phone.A.have talkedB.talkedC.has talkedD.was talking43.Bad luck! I myself out of the house again!A.lockB.lockedC.am lockingD.will lock44.I scared of dogs since a dog hurt me when I was 5 years old.A.will beB.wasC.have beenD.would be45.—Where were you this morning?—I in the supermarket.A.will shopB.am shoppingC.was shoppingD.have shoppedⅡ.用所给单词的适当形式填空1.[2018·包头] Her father （drop） her off at the school gate and then drove to work.2.[2018·兰州] Look! The Smiths （eat） dinner in the kitchen.3.[2018·北部湾] I （forget） to turn off the light when I left my room yesterday.4.[2018·武威] An apple a day （keep） the doctor away.5.[2018·无锡]You （promise）to take our boy to Disneyland last year. Don’t let him down again.6.[2018·安顺] The famous star （die） for nearly 15 years.7.[2018·临沂]We should protect the endangered wild animals, or they （appear） in the near future.8.[2018·宿迁] I （not finish）my homework yet. I am afraid I can’t go to the park with you.9.[2018·常州]—Do you want to go to the talk on recycling?—Great!I （look） for some information for my article on the topic.10.France is a beautiful country and （cover） an area of over 260,000 square miles.1.[2018·遂宁] Do you know the 32nd Olympic Games in Tokyo in 2020?A.is heldB.holdC.will holdD.will be held2.[2018·梧州]—Your hometown is beautiful, and the air is really fresh.—Yes. Many trees and flowers around here every year.A.plantB.are plantedC.was plantedD.will plant3.[2018·徐州] The latest mobile phone in China.A.will makeB.has madeC.is makingD.is made4.[2018·长春] We Chinese by the touching documentary Amazing China.A.encourageB.encouragesC.are encouragedD.are encouraging5.[2018·广东]Many shops in China to shut down as a new law against ivory（象牙） trade came into effect on January 1st, 2018.A.orderedB.didn’t orderC.were orderedD.weren’t ordered6.[2018·咸宁]—The 19th National Congress of the CPC（中共十九大）in Beijing last year. —Our country has been into a new era（时代） since then.A.heldB.was heldC.has heldD.had held7.[2018·长沙改编] British physicist Stephen Hawking, who as the “smartest man alive”, passed away in England on March 14, 2018.A.praisedB.was praisedC.will be praisedD.is praised8.[2018·江西] Kids have to take many after-school classes. They hard to study for good grades.A.pushB.are pushedC.are pushingD.have pushed9.[2018·资阳] Tea, the most popular drink in the world, by accident in China.A.discoveredB.is discoveredC.will be discoveredD.was discovered10.[2018·安徽] The weatherman says a rain shower this afternoon in the south.A.expectsB.expectedC.is expectedD.was expected11.[2018·曲靖]Nowadays China for its new “four great inventions”—shared bicycles, electronic payments, high-speed railways and online shopping.A.was knowingB.was knownC.is knowingD.is known12.[2017·恩施改编] In old days, the poor for the boss for over 18 hours a day.A.was made to be workedB.were made workC.were made to workD.are made to work13.[2019·原创]There have been 2 underground lines in Shijiazhuang and 4 more lines in a few years.A.are builtB.will buildC.will be builtD.are going to build14.[2019·原创] Tiangong-1 space on Sept. 29, 2011.It re-entered the Earth’s a tmosphere on April 2, 2018.A.sent intoB.was sent intoC.sends intoD.is sent into15.—When shall we go to watch the basketball match in the sports center?—Not until the work tomorrow.A.will be finishedB.is finishedC.will finishD.has finished参考答案动词的时态Ⅰ.1.D根据后句用的现在完成时可知,说的是目前情况,所以用一般现在时。

语法专题（十四）连词和状语从句语法综合演练1.[2018·上海] Mr. Black walked around and offered help we were doing an experiment.A.whileB.althoughC.untilD.unless2.[2018·莱芜] Jerry will succeed in working out the problem he gives up.A.ifB.becauseC.soD.unless3.[2018·扬州] Hawking is no longer with us he will continue to inspire the world.A.soB.ifC.butD.as4.[2018·沈阳] My grandparents wrote letters to keep in touch with others they were young.A.whenB.sinceC.afterD.before5.[2018·百色] Wu Lan is still young, she can help her mother do some housework on weekends.A.SoB.UntilC.ThoughD.Unless6.[2018·盘锦]—I am terribly sorry, I can’t go shopping with you this afternoon.—It’s OK. We can go next time.A.soB.butC.andD.or7.[2018·辽阳] I can lend my bike to you you promise to take good care of it.A.whileB.ifC.althoughD.unless8.[2018·云南]We don’t know the love of our parents we become parents ourselves one day.A.untilB.afterC.whenD.since9.[2018·梧州] Hurry up, you’ll miss th e early bus.A.orB.andC.soD.but10.[2018·昆明] I have lost everything in this terrible earthquake, I have not lost my life.A.BecauseB.SoC.AlthoughD.If11.[2018·黔南] my friends I like playing computer games because we think it wastes time.A.Both; andB.Not only; but alsoC.Either; orD.Neither; nor12.[2018·黔南] Jack has learned more about teamwork（团队合作）he joined the soccer team.A.untilB.sinceC.whileD.though13.[2018·咸宁]—Harry Potter is an interesting novel I want to read it again.—I agree with you.A.so; thatB.too; toC.such; thatD.as; as14.[2018·黄石] I always get up early on weekdays, I’m afraid I will be late for school.A.becauseB.soC.thoughD.then15.[2018·十堰]—Mike, please turn down the music. Dabao Erbao are sleeping.—Sorry, I’ll do it right away.A.Neither; norB.Either; orC.Both; andD.Not only; but also16.[2018·无锡] He stayed up very late that night. he woke up in the morning, the sun was already high up in the sky.A.UntilB.AfterC.WhileD.As17.[2018·资阳] We will achieve our China Dream we work hard and never give up.A.andB.soC.ifD.but18.[2018·天水] Taxi Apps（打车软件） can help us travel around more easily. more and more people like using them.A.OrB.SoC.AndD.But19.[2018·苏州]—Excuse me, can you tell me the way to the nearest underground station?—Walk straight on you see a white building. It’s right there.A.thoughB.sinceC.untilD.if20.[2017·德州]Many people like reading newspapers they can learn what’s hap pening in the world.A.so thatB.ever sinceC.as soon asD.even though21.[2017·东营]WeChat Pay makes our life convenient. We can buy things we don’t take any money.A.unlessB.becauseC.even ifD.so that22.To make your DIY work perfect, you’d bet ter not start you get all the tools ready.A.whenB.whileC.beforeD.after23.Which would you like, tea milk?A.andB.orC.butD.so24.[2018·兰州] I will call you as soon as he here.A.arriveB.will arriveC.arrivesD.arrived25.[2018·乌鲁木齐] While Nick CCTV News, someone knocked at the door.A.watchedB.was watchingC.watchD.watches参考答案1.A2.D if意为“如果”;because意为“因为”;so意为“因此”;unless意为“除非”,相当于if…not,意为“如果……不”。