Biol 212 Exam 3
Spring 2014, Section 7
1. Which of the following is UNTRUE? In a multicellular organism different cells become specialized for different functions because…
A. Different cells express different transcriptional regulators.
B. Transcriptional regulators are modified differently in different cells.
*C. Different cells contain different genes.
D. Chromatin conformation varies among different cells.
E. DNA is chemically modified differently in different cells.
F. None of the above.
2. Which is a potential point of gene regulation in eukaryotes but not prokaryotes?
A. Transcription
*B. RNA processing
C. Translation
D. Post-translation
E. All are used in both prokaryotes and eukaryotes
3. Which of the following is an example of post-translational regulation?
A. Intron splicing
B. DNA methylation
*C. Histone methylation
D. RNA polymerization
E. Transcriptional repression
4. Which of the following is NOT DIRECTLY involved in transcriptional regulation?
A.Enhancer elements
B.Transcriptional repressor proteins
C.DNA methylation
D.Chromatin structure
*E. G protein coupled receptor activation
5. Glucocorticoid “target gene” expression is activated by glucocorticoid hormone because
A. glucocorticoids activate a receptor kinase that phosphorylates transcription factors.
*B. glucocorticoid is a small effector molecule that binds a transcription factor and activates it.
C. DNA becomes glucosylated, triggering gene transcription
D. glucorticoids degrade transcriptional repressors
E. All of the above
6. How does DNA methylation usually effect transcription of a gene?
A. Enhances transcription
B. Delays transcription
*C. Reduces transcription
D. No effect on transcription
E. Results in methylated mRNA
7. If binding of a small effector molecule activates a transcriptional repressor, then
increasing concentrations of the effector would result in
A. Increased transcription of target genes
*B. Decreased transcription of target genes
C. Increased transcription of the repressor
D. Decreased transcription of the repressor
E. A & D
8. Histone proteins
A. form nucleosomes
B. contain a “code” of posttranslational modifications that regulate gene transcription
C. are important in determining chromatin structure
D. interact with DNA to influence accessibility of transcriptional regulators to gene promoters
*E. all of the above
9. Combinatorial regulation of gene transcription involves all the following EXCEPT
A. chromatin structure
B. repressor proteins
C. DNA methylation
D. regulatory DNA sequences (elements) near genes
*E. second messengers
10. Induction of corpus luteum maintenance in the ovary by chorionic gonadotropin hormone from the uterus is an example of
A. autocrine signaling
B. paracrine signaling
C. juxtacrine signaling
*D. endocrine signaling
E. direct signaling
11. Steroid hormones can utilize intracellular receptors because
*A. steroid molecules are small and apolar and can freely diffuse through membranes
B. responsive cells contain steroid channels that allow the hormone into the cell
C. responsive cells contain membrane transporter proteins that bring the hormone into the cell
D. in response to a stimulus, steroids are produced inside the cell where they can bind their receptors
E. steroid hormones are transported from cell to cell primarily through gap junctions
12. Which of the following is NOT an example of cell signaling?
A. Plants changing growth direction in response to light.
B. Species recognition among sperm and eggs of marine corals.
C. Small effector molecules passing through gap junctions.
*D. Formation of tight junctions between epithelial cells.
E. Anterior pole specification by the bicoid morphogen in Drosophila
13. During development of multicellular organisms, pattern formation involves all the following EXCEPT
A. Local cell signaling
B. Morphogen concentration gradients
C. Generating the spatial arrangement of cell types or body parts
D. Positional information
*E. Polycistronic intron splicing
14. A protein that changes conformation upon interaction with a signal to trigger a cellular response is called a
A. Transporter
B. Enzyme
*C. Receptor
D. Transcriptional activator
E. Transducer
15. Signal transduction refers to
A. the transport of hormones in the bloodstream
B. electron transport leading to oxidative phosphorylation
*C. a series of events that occur upon receptor activation, leading to a cellular response
D. sequential modifications to the histone code
E. post-translational modifications to a signal ligand
16. When activated, receptor kinases are likely to
A. enter the cell
*B. trigger a protein kinase cascade
C. generate ATP
D. bind the extracellular matrix
E. exchange GDP for GTP
17. All but which of the following are involved in physically holding cells together?
*A) G-protein coupled receptors
B) anchoring junctions
C) extracellular matrix
D) cell adhesion molecules
E) middle lamella
18. Normal Arabidopsis plants flower in response to long day photoperiods. Upon floral induction, the shoot apical meristem converts to a flower meristem. As shown in the figure, plants that are homozygous for a recessive loss-of-function mutation in the ft gene do not flower in response to photoperiod.
What do these results indicate about the function of the normal FT gene?
*A. FT is necessary for photoperiod induced flowering.
B. FT is sufficient for photoperiod induced flowering.
C. The FT gene is necessary AND sufficient for photoperiod induced flowering.
D. No conclusion can be drawn from this result.
19. In normal plants, expression of the FT gene is activated by long day photoperiod. When the FT coding sequence is placed under the control of a promoter that expresses all the time, the plants flower early, even under non-inductive short day photoperiod. What do these results indicate about the function of the normal FT gene?
A. FT is necessary for photoperiod induced flowering.
*B. FT is sufficient for photoperiod induced flowering.
C. The FT gene is necessary AND sufficient for photoperiod induced flowering.
D. No conclusion can be drawn from this result.
20. Plants that are homozygous for another recessive loss-of-function mutation in the fd gene also fail to flower in response to photoperiod. Behavior of genetic mosaics with normal leaves and mutant shoot apical meristems (SAMs), or vice versa, is shown below
*A. FT encodes a signal molecule and FD encodes a receptor
B. FD encodes a signal molecule and FT encodes a receptor
C. FT and FD both encode signal molecules
D. these results indicate neither gene encodes a signaling molecule
E. nothing conclusive can be determined from these results
21. Which cell junctions are most similar between plant cells and animal cells.
A. tight junctions and middle lamella
B. anchoring junctions and plasmodesmata
C. gap junctions and middle lamella
D. anchoring junctions and gap junctions
*E. plasmodesmata and gap junctions
22. Which of the following provides strong attachments among adjacent animal cells?
*A. Anchoring junctions
B. pectin
C. tight junctions
D. gap junctions
E. plasmodesmata
23. Which of the following is NOT normally associated with the normal progression of development?
A. Hierarchies of transcriptional regulation
B. Progressive restriction in cell fate
*C. Increasing levels of totipotency
D. Cell signaling
E. Pattern formation
24. Segment identity genes
A. are found exclusively in Drosophila and other insects.
B. when mutated cause Drosophila embryos to have 2 heads
C. are morphogens
*D. belong to the HOX gene cluster
E. all of the above
25. Which of the following is NOT a function for the ECM?
*A. Cell secretion
B. Cell signaling
C. Tissue strength
D. Cell shape
E. Cell connections
26. Stem cells (pick all that are correct):
A. produce one multipotent and one univalent daughter
*B. are pluripotent in embryos and undergo progressive cell fate restriction
C. undergo programmed cell death
*D. can sometimes be reprogrammed
E. have not yet shown therapeutic value
27. When embryonic stem cells are transplanted into different tissues of a host organism, they commonly
A. migrate to the site from which they were isolated
B. develop into entire embryos
C. become hematopoetic
*D. differentiate according to signals received from neighboring cells
E. All of the above
28. In plant development, the following is NOT true of shoot apical meristems
*A. they only occur in embryos
B. they involve pattern formation, morphogens, transcriptional hierarchies, progressive restriction of cell fate
C. they occur at the tips of shoots and roots
D. they are a self-renewing cell population (like animal stem cells)
E. Continually produce organs, tissues, ect.
29. Which of the following DOES NOT contribute to the differentiation of stem cell daughters?
A. transcriptional hierarchy
B. cell signaling
C. progressive restriction of cell fate
*D. altered genetic content
E. altered gene expression
30. Plant development is different from animals because plant development
A. does not involve stem cells
*B. involves organ formation in adults
C. does not involve transcriptional hierarchies
D. does not involve pattern formation
E. does not involve morphogens
31. In flowers, the identities of the different floral organs (petals, stamens, etc.) is controlled by
A. a transcriptional hierarchy
B. combinatorial regulation
C. homeotic genes
*D. all of the above
E. none of the above
32. In plants, stem cells
A. are found strictly in stems
B. are restricted to embryos
*C. are located in meristems
D. make up most of the cells of the plant
E. do not exist in the same sense as in animal tissues
33. Which of the following fits the definition of stem cells?
A. cells that can be reprogrammed to form any cell type
B. cells that can be immortalized in the laboratory
C. cells from which embryos can be cloned
D. cells that are highly interconnected by gap junctions
*E. a self-propagating population of cells that also produces differentiated cells
ⅠV ocabulary and Structure （10 points，i point for each item） 从下列各句四个选项中选出一个最佳答案，并将选项号填在答题纸的相应位置上。 1.Studies have shown _______ teenagers often suffer form depression. A.that B.which C.in which D.in that 2.The party has failed to _______ the majority of voters that it is capable of governing the country. A.trust B.credit C.convince D.believe 3._______ driving around all day looking for somewhere to park，why don‘t you take a bus to town？ A.In spite of B.Rather than C.In palce of D.Other than 4.The kids are _______ be hungry when they get home—they always are. A. obliged to B. bound to C. desired to D. motivated to 5.All the characteristics that distinguish birds _______ other animals can be traced to prehistoric times. A.to B.between C.for D.from 6.When the city was _______，everyone knew that total defeat was certain. A.cut off B.cut down C.cut across D.cut out 7.If we _______ everything ready by now，we should be having a terrible time tomorrow. A.hadn‘t got B. didn’t get C.wouldn‘t have got D. wouldn’t get 8.In his composition there were no other errors _______ a few misspelled words. A.beside B.except C.then D.than 9.In deciding _______ a course of action，the candidates tried to estimate its likely impact
大学英语口语测试试题 1.Shopping 1)Do you enjoy shopping? Why or why not? I seldom go shopping. It takes too much time. I like to go shopping very much. It is so interesting. 2) What do you usually buy when you go shopping? I only shop for daily necessities, such as toothbrush, toothpaste, toilet paper, cleansing cream, soap, shampoo, washing powder… I like music/books so sometimes I go to campus bookstores to look for my favorite CDs/the recent bestsellers. 3) Where do you usually go shopping, supermarkets or department stores? Downtown or in campus stores ? I usually do my shopping at large supermarkets/campus stores/shops nearby since they often have good buys/it saves time. I enjoy shopping at supermarkets. I love to see shelf on shelf stacked with all kinds of delicious /nice things. Supermarkets are so convenient. You can get almost everything you want in a big supermarket. I hate shopping in a supermarket. It’s always so crowded/the quality of goods is questionable/not so good/ not guaranteed. I like going shopping in big department stores downtown because I think they offer a better service. 4)When you buy a dress or a coat, which do you give first priority to: color, price, quality, style or brand name? I think price/color/style/quality is the most important. I love to buy clothes that are in fashion but they are mostly too expensive for me. I love buying things when they are on sale and I often manage to get a good deal. 5) Do you enjoy bargaining? Are you good at it? I love sales/enjoy bargaining/am good at bargaining with street peddlers. I always/never ask for a discount. 2. Sports 1) Do you like sports? What is your favorite sport? I like swimming/jogging/fishing/tennis, etc. My favorite sport is basket/volleyball/football, etc. 2)Do you like jogging? Why or why not? Jogging is considered a healthy sport for both the young and the old/for people of all ages. Many people begin jogging because they believe it is a very good form of exercise/can make their hearts stronger / can help them lose weight. Jogging against the cold wind is also a test of one’s will power. 3)Why do people need to play sports? Playing sports can help us to relax. Sitting in a chair all day has made me very lazy. I can get my figure back if I play a sport. I can meet some new friends when I play sports.
大学英语1测试答案 注意：标红为答案 测验一： （AABAA BBACA CBCCA CAAAA，题目顺序随机）题目1：They have a share.
A. each； B. every 题目2：child enjoys Christmas. A. Every； B. Each 题目3：My pen is lost. This one is my A. brother； B. brother's 题目4：Have you the skirt by yourself? A. made； B. built 题目5：My room is than the one next door. A. cleaner； B. cleanner； C. cleanest 题目6：John is the of the three brothers. A. taller； B. tallest； C. tall 题目7：We've entered an agreement. A. for； B. into； C. * 题目8：He entered his son the English examination. A. for； B. into； C. * 题目9：No one saw the thief when he entered the buliding. A. for； B. into； C. * 题目10：Everyone he will win. A. believes； B. believe 题目11：Just then, the telephone rang. It rang____. A. at once； B. immediately； C. again； D. at that moment 题目12：The shop assistant found some curtain material___me.
2013-2014学年第一学期新疆师范大学 青年政治学院考试 大学英语1试题（考试时间：120分钟闭卷）A卷 注: 本次考试试卷的所有答案全部写在专用答题纸上。考试结束 后，试卷和答题纸一起上交。 I. Matching the definitions in Column B with the words in Column A. (10 points in total, 1 point for each) 1.efficient a. careful and hard work 2.expert b. produce something for the first time 3.propose c. able to plan and work well 4.constant d. dismiss somebody from a job 5.suspect e. choose 6.invent f. satisfied, pleased 7.select g. put forward for consideration 8.diligence h. suppose 9.fire i. happening very frequently 10.content j. person with special skill or knowledge II. Giving Chinese equivalents to each of the following phrases and expressions. (10 points in total, 1 point for each) 11.by no means 12. long for 13. break off 14. after all 15.be bound to 16. keep up with 17.find out 18. work on 19.round the corner 20. set one’s mind to III. Fill in each blank with the proper form of the words given in the brackets. (10 points in total, 1 point for each) 21. It’s very (kindly) of you to invite me to tea. 22. We had fine weather all through July except for an (occasion) thunderstorm. 23. If the tea is too strong, you can (add) some more water. 24. Jenny is very (reliably)--- if she says she’ll do something she’ll do it. 25. After reading the novel, he was too (excite) to go to sleep that night. 26. The cat watched the mouse hole with great (patient). 27.Would you mind (repeat) what you’ve just said? 28.You will find this dictionary most (help) for learners of English. 29.I am (reluctantly) to get out of bed on cold mornings. 30.To my (disappoint), the book was not half so good as I had
<大学英语语法>考查试题 一．选择正确答案填入相应的空格处：（70%） forest guards often find campfires thet have not been ______completely. down B. put out C. put away over 2..Of all the economically important plants, palms have been______. least studied the least less and less study the less is a continuous supply of fuel oil. things needed is needed is needed their need 4.The survey indicates that each Chinese family averaged_____of daily television usage in 1994than in 1993. many as 60 minutes B. 60 minutes more C. 60 minutes C. more 60 minutes 5.All evidence the court has collected boils_____to the fact that he is a spy. A. down B. off C. up D. overluggage, the group of tourists hurried to the airport.2009-2010学年第二学期（） A. After packed packed packing was always nervous_____ in city traffic. driving B. driving driving driving 8. I saw Alan skimming over the water and, finally, ____ into it.
精心整理 大学英语（一） 行政班级分级班级姓名学号 C. A measuring system. D. A control system. 2. A. Car prices. B. Car services.
C. The company’s business. D. The company’s culture. 3. A. It’s easy to do. B. It’s challenging. dialogue, there are some recorded questions. Both the conversations and questions will be spoken two times. Conversation 1
6. A. Breakfast. B. Dinner. C. A 5 dollar gift card. D. Bus service to the airport. 10. A. Make an appointment with her. B. Talk with her about a new order.
C. Send her an email about the shipment. D. Call her back when receiving the shipment. Directions: This part is to test your ability to construct grammatically correct sentences. It consists of 2 sections.
《新视野大学英语1》试卷（A） 适用班级：2013-2014第1学期重修班 I. Vocabulary and Structure (20points) Directions: Choose the best one to complete each sentence. 1. She cut her hair short and tried to ____ herself as a man. A. decorate B. disguise C. fabricate D. fake 2. She watched him ____ all the handles and gears in his automobile until she thoughts she could run it herself. A. modulate B. incorporate C. manipulate D. induce 3. The French police are legally entitled to ____ anyone's movements as they please. A. confine B. restrict C. restrain D. limit 4. Some people argue that the death ____ does not necessarily reduce the number of murders. A. fine B. cost C. punish D. penalty 5. The university ____ consists of full professors, associate professors and assistant professors. A. crew B. personnel C. faculty D. staff 6. The latest edition of The Complete Works of Lu Xun comes in sixteen ____. A. copies B. volumes C. versions D. editions 7. Many students found the book ____ : it provided them with an
Network Education College, BLCU 《大学英语（一）》模拟试卷一 注意： 1．试卷保密，考生不得将试卷带出考场或撕页，否则成绩作废。请监考老师负责监督。2．请各位考生注意考试纪律，考试作弊全部成绩以零计算。 3．本试卷满分100分，答题时间为90分钟。 4.本试卷试题为客观题，请按要求填涂答题卡，所有答案必须填涂在答题卡上，答在试题卷上不给分。 I.Multiple Choices. (2 points for each, altogether 40 points) Directions:There are 20 sentences in this section. Beneath each sentence there are four choices respectively marked by letters A, B, C and D. Choose the word that you think best complete the sentence. Write your answers on the answer sheet. 1. The house isn't big enough for a family of four, and_______, the price is not reasonable. A. even though B. furthermore C. therefore D．in that 2. Now there is no need to worry about the deadline since we are ahead of_______. A. table B. chart C. schedule D．graph 3. Doing all the housework_______ my mother at least three hours a day. A. spends B. affords C. occupies D．spares 4. _______ the form with your name and your address. A. Write B. Fill in C. Take down D．cover 5. The_______ runner can run 2 miles in fifteen minutes. A. common B. usual C. average D．general 6. Since it is late to change my mind now, I am_______ to carrying out the plan. A. obliged B. committed C. engaged D．resolved 7. By the time you get to New York, I_______ for London. A. would be leaving B. am leaving C. have already left D．shall have left 8. Researchers discovered that plants infected with a virus give off a gas that_______ disease resistance in neighboring plants. A. contracts B. activates C. maintains D．prescribe 9. By law, when one makes a large purchase, he should have_______ opportunity to change his mind. A. accurate B. urgent C. excessive D．adequate 10. The article suggests that when a person_______ under unusual stress he should be especially careful to have a well-balanced diets. A. is B. were C. be D．was 11. If he _______of all the dangers, he should change his mind. A. knows B. be clear C. hears D．be aware 12. This crop has similar qualities to the previous one, _______both wind-resistant and adapted to the same type of soil. A. being B. been C. to be D．having been
《大学英语》试卷考试时间：90分钟闭卷任课老师： 班级：学号：姓名：成绩：Ⅰ.Match the words in column A with the explanations in column B. (15 points) Column A Column B 1.term a.. easy to get to 2.department b. accept sth.as true 3.overseas c. give great pleasure to 4.charge d. one of several division in a university, etc. 5.worth e. abroad 6.believe f. one of the periods into which the academic year is divided 7.somewhat g.. become less tense; rest 8.convenient h.. good of useful enough to do or have 9.relax i. responsibility, care or control 10.delight j. a little II.Multiple choice questions (15 points) There are five sentences in this section. Beneath each sentence there are four choices marked A, B, C and D. Choose one or more that you think are suitable. 11. Take your camera with you. We’d like to take some of the beautiful park. A. paintings B. pictures C. files D. films 12. The is very useful. She can helps me to find many good books. A. employer B. member C. monitor D. librarian 13. Small cars are of fuel, so they have more appeal for consumers. A. free B. short C. typical D. economical 14. Next Sunday is her birthday.I ______her a bicycle as a present. A.allow B.give C.offer D.promise 15. I was in s small countryside in China. A. brought up B. bring up C. raised up D. raise up 16. Miss Yang is likely to be for promotion. A. sent B. recommended C. advised D. reported 17. The number of people invited _________ fifty, but a number of them
题目部分，(卷面共有3题,21.0分,各大题标有题量和总分) 一、Fill in the Blanks with the Right Word（实词填空）(1小题,共1.0分) 1．(0.5分) These charges and interest rates are va_______ and the Bank reserves the right to change them from time to time. 二、Reading Comprehension 阅读理解(2小题,共20.0分) 1．(10分)Questions 1 to 5 are based on the following passage. In the United States a university professor is given a few months of freedom from his duties about every seventh year for travel or advanced study. This period of freedom from teaching is called a “study or research leave”. Its purpose is to give the professor experiences which will make him a wiser person and a better teacher when he returns to his university. Few study leaves are interesting enough to be described in national newspapers and magazines. Recently, however, there was an exception. The public learned how Dr. John R. Coleman, president of Haverford College, had spent his study leave. At the age of 51, Dr. Coleman was determined to escape from university life for a few months and to get a variety of experiences in the world of work. He especially wanted to learn about people. People who do hard physical labor were especially interesting to him. “I wanted to get away from the world of words and political matters and parties – the things a president does,” Dr. Coleman later explained to news writers. “As a college president you begin to take yourself very seriously and to think you have power you don't. You forget things about people. I wanted to relearn things I’d forgotten.” Telling no on e of his plans, Dr. Coleman started his study leave on a farm in Canada, hundreds of miles from his college. Getting up at 4:30 each morning, working thirteen hours a day in fields, he prepared himself physically for his next job, digging ditches in Atlanta, GeorgiA、 After that, the college president washed dishes ina Boston restaurant. During the last ten days of his leave, he worked as a garbage collector. 1. The first paragraph is mainly about _______________. A、why a professor should be free from his duties every seventh year B、how professors spend their study leave C、what a study leave is and its purpose D、how a study leave makes a professor a wiser person and a better teacher 2. A study leave is a period of freedom from duties allowed to a university teacher who has taught ________ since his last leave. A、for six years B、for seven years C、for a term D、for a university year 3. People learned about Dr. Coleman's unusual experiences from ________. A、his colleagues B、the boss of a Boston restaurant C、the Canadian newspapers and magazines D、the U.S. newspapers and magazines 4. Dr. Coleman carried out his study leave in an unusual way because ________. A、he hates his university life, especially his job as a president B、he wanted to learn about people, especially people who do hard physical labor
《大学英语1》课程综合复习资料 I. Use of English 1. — Write to me when you get home. — OK, I _______. A) must B) should C) will D) can 2. ― I hope I am not interrupting your work. ― ________________. A) Oh，that’s all right. B) O.K. Let’s start again. C) Please go on with your work. D) It’s hard to say. 3. —let me introduce myself. I am Tom. — _______. A) What a pleasure B) It's pleasure C) I'm very pleased D) Pleased to meet you 4. — Could you pass me the salt and pepper? — _______. A) Sorry，I didn't know what you mean. B) Ok，here you are. C) No，I won't. D) I don't know. 5. —Why haven’t you bought any butter? — I _________ to but I forgot about it. A) liked B) wished
D) expected 6. —“Where is Mary?” —“She ____ to school.” A) will go B) has been C) has gone D) went 7. — Have you finished your housework____? — Yes. I have____ finishe A) yet，already B) already，yet C) ever，never D) still，just 8. — How are you? — ________ A) I am quite good. B) I am very sorry. C) How are you? D) Fine，thank you. 9. — I usually go there by train. — Why not _______ by boat for a change? A) try to go B) try going C) try go D) go to try 10. —Do you think _________ he should go to the music club or not? —Sorry, I have no idea. A) that B) what
山东工商学院 2020学年第一学期大学英语（一）课程试题 A卷 （考试时间：120分钟，满分100分） 特别提醒：1、所有答案均须填写在答题纸上，写在试题纸上无效。 2、每份答卷上均须准确填写函授站、专业、年级、学号、姓名、课程名称。 一单选题 (共20题，总分值40分 ) 1. ________________ only by one’s appearance, I’m sure, will have you get just half of him or less （2 分） A. Judged B. Judging C. To be judged D. Judge 2. It is one of the major tasks of the training to learn to ________________ difficult situations. （2 分） A. cope with B. add up C. go with D. get on 3. __________ we’ll have the sports meet tomorrow depends on the weather. （2 分） A. When B. If C. Whether D. That 4. Mark was asked to send his resume to the ________________ department of the company he applied for. （2 分） A. personal B. people C. personnel D. person 5. The number of the students who took part in the entrance examination __________ great. （2 分） A. is
大学英语试题及答案一、交际英语 Can I help you, sir - _________ , I don't need your help. . I'd like to withdraw some money. , leave me alone. 't bother me! 答案：B I wonder if I could use your computer tonight - ___________ I'm not using it right now. , here you are. don't know. doesn't matter. cares 答案：A Excuse me, how much is the jacket - It's 499 Yuan. ________ , no. That's OK! do you like it do you prefer you like to try it on 答案：D It's rather cold in here. Do you mind if I close the window - ________ , please. , please. , please. don't like it. 答案：B Do you mind my smoking here - _______
, thanks. , I do. . I'd rather not. idea. 答案：B 二、阅读理解 Peter arrived home and discovered that he had forgotten his door key. He rang the bell, but nobody came to open the door. He rang again, and waited, but still there was no answer. He walked around the house to see if he could find an open window. But they were all closed. It was beginning to rain and he did not know what to do. Dorothy, his wife, had obviously gone out, and he did not know where she had gone, or when she would return. He waited for half an hour. Still nobody came. Finally feeling wet and angry, he picked up a big stone and threw it through the kitchen window and was climbing through it. When he heard the front door open, his wife came back. could not open the door with his key one day. 答案：B was raining that day. 答案：A threw a big stone through a window to get into his house. 答案：A wife came back when he was walking around the house.