2018年《大学英语》网上学习习题、在线考试及答案

一、单选 1、1. The cost of the dam reconstruction would _____ from 2.5 to 3 million pounds. A. deserve B. range C. spend D. include （分数：1 分） A. deserve B. range C. spend D. include 标准答案是：B。 2、2. We cannot get an answer yet, for _____ to that problem is still under discussion. A. action B. strategy C. solution D. impact （分数：1 分） A. action B. strategy C. solution D. impact 标准答案是：C。 3、3. Among these articles, which do you think are most to interest our students? A. unexpected B. awkward C. competent D. likely （分数：1 分） A. unexpected B. awkward C. competent D. likely 标准答案是：D。 4、4. The body cannot store vitamin C so it is to have a fresh supply every day. A. essential B. visible C. ultimate D. profound （分数：1 分） A. essential B. visible C. ultimate D. profound 标准答案是：A。 5、5. Henry seemed by this completely unexpected turn of events. A. consumed B. bewildered C. liberated D. melted （分数：1 分） A. consumed B. bewildered C. liberated D. melted 标准答案是：B。 6、6. Don’t to let me know if there’s anything I can do for you. A. hesitate B. reject C. puzzle D. thrill （分数：1 分） A. hesitate B. reject C. puzzle D. thrill 标准答案是：A。 7、7. As a teacher, he thinks his business is to stir up in his students rather than insist on obedience. A. observation B. curiosity C. superiority D. judgmen （分数：1 分） A. observation B. . curiosity C. superiority D. judgmen 标准答案是：B。 8、8. Her son did not seem to ____ any importance to what she had said. A. stick B. notice C. attach D. remind （分数：1 分） A. stick B. notice C. attach D. remind 标准答案是：C。 9、9. Transitional Chinese food is far to McDonald’s and KFC or any other fast foods I know. A. immune B. superior C. essential D.similar （分数：1 分） A. immune B. superior C. essential D. similar 标准答案是：B。 10、10. His bedroom a single bed with a small television at its foot. A. makes up B. consists of C. lays out D. serves as （分数：1 分） A. makes up B. consists of C. lays out D. serves as 标准答案是：B。是 一、单选 1、1. It is reported that a (n) ______of accidents has occurred at that crossroads. A. series B. lot C. number D. amount （分数：1 分） A. series B. lot C. number D. amount 标准答案是：A。 2、2. I have two friends but ______ of them likes to go fishing with me. A. none B. neither C. both D. either （分数：1 分） A. none B. neither C. both D. either 标准答案是：B。 3、3. The Olympic Committee has drawn up strict rules for the sportsmen to ________. A. go by B. go on C. go over D. go after （分数：1 分） A. go by B. go on C. go over D. go after 标准答案是：A。 4、4. Life is often compared ________ a stage by many writers. A. like B. as C. with D. to （分数：1 分） A. like B. as C. with D. to 标准答案是：D。 5、5. When do you wish to visit Canada? ___ I am settled, I’ll go there. A、As B、Since C、Once D、While （分数：1 分） A. As B. Since C. Once D. While 标准答案是：C。 6、6. Henry’s actually of telling lies, pretending to be sick when he’s healthy. A. capable B. spontaneous C. competent D. expert （分数：1 分） A. capable B. spontaneous C. competent D. . expert 标准答案是：A。 7、The rise in unemployment the government’s plans for economic recovery. A. converted B. frustrated C. collapsed D. dismayed （分数：1 分） A. converted B. frustrated C. collapsed D. dismayed 标准答案是：B。 8、8. Linda is 35 years old and, after two close relationships, the prospect of staying single ______ her. A. impresses B. depresses C. threatens D. stuns （分数：1 分） A. impresses B. depresses C. threatens D. stuns 标准答案是：C。 9、9. ____ the look on his face, he doesn’t quite understand what the speaker is saying. A. Judge by B. Judging by C. To judge by D. To be judged by （分数：1 分） A. Judge by B. Judging by C. To judge by D. To be judged by 标准答案是：B。 10、10. The manager said that there were two reasons ______ our sales dropped sharply last year. A. because B. since C. why D. while （分数：1 分） A. because B. since C. why D. while 标准答案是：B。 一、单选 1、1. Lucy, who did not even go to grade school, had no of a job at the time. A. interview B. pressure C. prospect D. application （分数：1 分） A. . interview B. pressure C. prospect D. application 标准答案是：C。 2、2. The workers in the factory stopped working in against their foreman using bad language. A. protest B. threat C. conflict D. criticism （分数：1 分） A. protest B. threat C. conflict D. criticism 标准答案是：A。 3、3. Mr. Brown had hardly said a word since supper, _____ had his wife. A. either B. or C. nor D. so （分数：1 分） A. either B. or C. nor D. so 标准答案是：C。 4、4. The old told me that it was no use thinking too much about one’s _____ youth. A. loss B. losing C. lose D. lost （分数：1 分） A. loss

B. losing C. lose D. lost 标准答案是：D。 5、5. Being aware that Jack was dishonest, the teacher demanded he _____ nothing but the truth. A. tell B. to tell C. telling D. tells （分数：1 分） A. tell B. to tell C. telling D. tells 标准答案是：A。 6、6. True love cannot be , and it is priceless. A. brought B. caught C. bought D. broad （分数：1 分） A. brought B. caught C. bought D. broad 标准答案是：C。 7、7. Marriage on true love often brings happiness. A. decided B. determined C. based D. relied （分数：1 分） A. decided B. determined C. based D. relied 标准答案是：C。 8、8. It is rather _____ that the research team as a whole still has little idea about the cause of that fatal disease. A.rewarding B. demanding C. embarrassing D.requiring （分数：1 分） A. rewarding B. demanding C. embarrassing D. requiring 标准答案是：D。 9、9. It had never _____ to me that our football team won the game. A. struck B. occurred C. hit D. meant （分数：1 分） A. struck B. occurred C. hit D. meant 标准答案是：A。 10、 10.__ __, we will review all the lessons before the final exam. A. If time will permit B. Time permitting C. If time permitted D. Time permits （分数：1 分） A. If time will permit B. Time permitting C. If time permitted D. Time permits 标准答案是：C。 一、单选 1、1. If you have to go through a smoke-filled area, you’d better with your head low. A. crawl B. retreat C. proceed D. drag （分数：1 分） A. crawl B. retreat C. proceed D. drag 标准答案是：A。 2、9. If doing one thing gives you an unpleasant feeling, the normal would be to stop doing it. A. perspective B. emotion C. reaction D. function （分数：1 分） A. perspective B. emotion C. reaction D. function 标准答案是：C。 3、8. Long after even the latest apple tree had finally broken into leaf, the mulberry’s branches remained stubbornly . A. empty B. bare C. stale D. dumb （分数：1 分） A. empty B. bare C. stale D. dumb 标准答案是：B。 4、7. These schools come under the supervision of locally committees. A. appointed B. rotated C. consisted D. composed （分数：1 分） A. appointed B. rotated C. consisted D. composed 标准答案是：A。 5、6. This technique is traditionally thought to be of Chinese . A. origin B. architecture C. source D. civilization （分数：1 分） A. origin B. architecture C. source D. civilization 标准答案是：A。 6、5. The doctor soon made the worried patient feel ease. A. with B. at C. on D. off （分数：1 分） A. with B. at C. on D. off 标准答案是：B。 7、4. Young __ he is, he has proved to be an able salesman. A. that B. who C. as D. which （分数：1 分） A. that B. who C. as D. which 标准答案是：C。 8、3. Please note that I will be away from Boston next week, __ you want to call me and discuss things. A. in case B. unless C. until D. so that （分数：1 分） A. in case B. unless C. until D. so that 标准答案是：A。 9、2. It is __ from my school to the railway station. A. two-hours walk B. two-hour’s walk C. two-hour walk D. a two-hour walk （分数：1 分） A. two-hours walk B. two-hour’s walk C. two-hour walk D. a two-hour walk 标准答案是：A。 10、10. This photo __ __ me of the days when I worked on the farm many years ago. A. reminds B. recalls C. retells D. remembers （分数：1 分） A. reminds B. recalls C. retells D. remembers 标准答案是：A。 一、单选 1、1. Now the air pollution in this city ______ more and more serious with each passing day. A. to become B. became C. becoming D. is becoming （分数：1 分） A. to become B. became C. becoming D. is becoming 标准答案是：D。 2、2. We should see ourselves as part of nature rather than in __________ with it. A. argument B. connection C. conflict D. crash （分数：1 分） A. argument B. connection C. conflict D. crash 标准答案是：C。 3、3.If you love plants, the chances you buy them on and then wonder where to put them. A. purpose B. impulse C. display D. cue （分数：1 分） A. purpose B. impulse C. display D. cue 标准答案是：B。 4、4. People invest money in this company ______ they believe it will make profits. A. though B. because C. unless D. until （分数：1 分） A. though B. because C. unless D. until 标准答案是：B。 5、4. People invest money in this company ______ they believe it will make profits. A. though B. because C. unless D. until （分数：1 分） A. though B. because C. unless D. until 标准答案是：B。 6、5. Mr. Brown had hardly said a word since supper, _____ had his wife. A. either B. or C. nor D. so （分数：1 分） A. either B. or C. nor D. so 标准答案是：C。 7、6. In _ Chinese culture, children’s marriage decisions were often made by parents. A. traditional B. historic C. remote D. initial （分数：1 分） A. traditional B. historic C. remote D. initial 标准答案是：A。 8、7. In theory, every person will have access an unlimited amount of information in the United States. A. to B. from C. at D. through （分数：1 分） A. to B. from

C. at D. through 标准答案是：A。 9、8. Our company has made a with a foreign automobile company to buy 500 cars. A. contrast B. contract C. concept D. contact （分数：1 分） A. contrast B. contract C. concept D. contact 标准答案是：B。 10、9. you show me your passport, please? A. Must B. Shall C. Should D. Would （分数：1 分） A. Must B. Shall C. Should D. Would 标准答案是：D。 11、10. A bird knows instinct how to build a nest. A. by B. with C. from D. through （分数：1 分） A. by B. with C. from D. through 标准答案是：A。 1. Wait till your turn (come). 正确答案：【comes 】 2. This time tomorrow they (sit) in the cinema 正确答案：【will sit 】 3. After he (finish) his breakfast, he went to the booking office. 正确答案：【had finished 】 4. Nearly a week passed before the girl was able to explain what (happen) to her. 正确答案：【had happened 】

5. Go out and get some fresh air! You (sit) there reading all morning. 正确答案：【have been sitting 】

6. When I entered the lab, she (make) an experiment. 正确答案：【was making 】

7. “What are you doing now?”--------“I (prepare) my lessons for the final exam.”

正确答案：【will prepare 】

8. He earned 1,000 dollars in (add) to his salary. 正确答案：【 addition 】

9. This is a (confuse) word because it has two meanings. confusing 正确答案：【confusing 】

10. He is very clever and his ability to improve his work is very （limit）. 正确答案：【unlimited 】

11. The child always does his homework (willing) so he hasn’t made much progress.

正确答案：【 unwillingly 】

12. A large (percent) of school-books now have pictures. 正确答案：【percentage 】

13. There is no real reason for (complain). 正确答案：【complaint 】

14. Were you (succeed) in finding a new house?

正确答案：【 successful 】

15. I don’t want to be (depend) on my parents because I am already an adult.

正确答案：【 dependent 】

16. Winning three gold medals is the most remarkable______(achieve) he has made so far.

正确答案：【 achievement 】

17. The engineer put forward a______(suggest) at the meeting to improve the public traffic system.

正确答案：【 suggestion 】

18. Please (cover) the pot. The food is too hot. 正确答案：【 uncover 】

19. We should use the language (purpose). 正确答案：【 purposely 】

20. Learning some (psychology) knowledge can help us know people clearly.

正确答案：【psychological 】

1. 你的目标应该是质量胜过数量。（quality；quantity） 正确答案：【Quality over quantity should be your goal . 】 2. 这篇新闻报导是完全根据实际情况写成的。(be based on) .

正确答案：【This news report is written not by basing on the truth. 】 3. 就业余爱好而言，珍妮和她妹妹几乎没有什么共同之处。

正确答案：【As far as hobbies are concerned, Jane and her sister have little in common 】

4. 南希(Nancy) 虽然很想参加辩论，但腼腆的不敢开口。

正确答案：【While she felt like joining the argument, Nancy was too shy to open her mouth. 】

5. 很明显是他的年轻助手在经营这家书店。

正确答案：【It is obviously his young assistant who is running the bookstore 】 1.形影不离的

正确答案：【inseparable 】

2、2.度过难关

正确答案：【 get through 】

3、3.祈祷

正确答案：【pray 】

4、4.针对某个人

正确答案：【take it personally 】

5、5.信任

正确答案：【 trust 】

6、6.就业

正确答案：【employment 】

7、7.偏见

18、18.He _________(write) her 10 letters since he met her last years. 正确答案：【 has written 】 19、19.I think it necessary for him ________ (finish) the work in time. 正确答案：【to finish 】 20、20.The house is ______ (complete) before his brother’s wedding ceremony. 正确答案：【to be completed 】

1. 相互理解对于友谊是至关重要的。 正确答案：【Mutual understanding is of great importance to friendship. 】 2、7.他现在正面临着一个十分重要的问题。 正确答案：【 He is now faced with an important problem 】 3、3. 是现代技术使我们走向成功。 正确答案：【 It is modern technology that leads us to success. 】 4、4.由于管理不善，他的公司垮台了。 正确答案：【 His company collapsed owing to mismanagement. 】 5、5.在关键时刻，我们应该有能力面对一切困难 正确答案：【At a critical moment, we should be capable of facing difficulties. 】 1.面试、面谈 正确答案：【interview 】 2、2.调查、研究 正确答案：【 research 】 3、3.知觉 正确答案：【consciousness 】 4、4.概述总结 正确答案：【summarize 】

5、5.最小量、最低限度的 正确答案：【minimum 】 6、6.自动的 正确答案：【automatic 】 7、7.特有的，特定的 正确答案：【specific 】 8、8.原谅 正确答案：【forgive 】 9、9.偏见 正确答案：【 prejudice 】 10、10.犹豫不决 正确答案：【 hesitate 】

1.You had better ________ (bring) enough money with you. 正确答案：【 bring 】

2、2.If I hadn’t listened to you, I would _______ (make) such a silly mistake. 正确答案：【have made 】

3、3.They have been receiving a four-day ______(intense) training course. 正确答案：【intensive 】

4、4.Eight hours’ sleep is the _________(最低限) that children should have. 正确答案：【minimum 】

5、5.It is very _________(consider)of you to send me a birthday card.

正确答案：【considerate 】

6、6.The elephant is the largest animal. _________(现存的). 正确答案：【 in existence 】

7、7.In the last three years， he switched from one _________(职业).to another. 正确答案：【profession 】

8、8.________（尽管）their differences, they fell passionately in love with each other. 正确答案：【Dispite 】

9、9.Robots , becoming_____(increase) prevalent in factories , are programmed and engineered. 正确答案：【increasingly 】

10、10.The important of these_____(vary) according to the nature of one's life-style. 正确答案：【varies 】

11、11.A man can not be really happy if what he enjoys____(do) is ignored by society as of no value or importance.

正确答案：【doing 】

12、12.The message_ Mr. Black was elected chairman of the committee arrived just in time. 正确答案：【 that 】

13、13.It is important to provide an environment __ people are encouraged to make suggestions at all levels of the company. 正确答案：【in which 】

14、14.Young __ he is, he has proved to be an able salesman. 正确答案：【as 】

15、15.It was unwise of the general manager to_ (充耳不闻) the complaints of his employees. 正确答案：【turn a deaf ear to 】

16、16.If the sun____rise in the west,my love for you would be unchanged. 正确答案：【were to 】

17、17.Distinguished guests and friends, welcome to our school, _____ (attend) the ceremony of the 50th Anniversary this morning are our alumni (校友) from home and abroad. 正确答案：【attending 】 18、18.Compared with his sister, Jerry is even more ______ (敏感)to, and more easily troubled by, emotional and relationship problems. 正确答案：【sensitive 】

19、19.He did not regret saying what he did but felt that he _____(express) it differently. 正确答案：【could have expressed 】

20、20. After the discussion of the_____ (execute) committee, the labor law was put into force in May,1994. 正确答案：【executive 】

1.他在纠正学生错误时总是采取积极的态度。 正确答案：【He always takes a very positive attitude when correcting pupils’ mistakes. 】 2、2.你的假设不是建立在充分的事实基础上的。 正确答案：【Your assumption is not based on full facts. 】 3、3.他由朋友陪同去听音乐会。 正确答案：【 His friend accompanied him to a concert. 】 4、4.机器人与自动化机器有重大的区别。

正确答案：【 Robots differ greatly from automatic machines. 】

5、5. 科学家们正致力于研究预报地震何时何地发生的计划。 正确答案：【Scientists are working on programs to predict where and when an earthquake will occur. 】

1/Passage 1 As little children, most of us were taught the virtue (美德) of honesty from fairy tales and other stories. The story of Pinocchio, who begins life as a puppet (木偶), teaches us the importance of telling the truth. In the story of young George Washington, who lies about cutting down the cherry tree, we learn that he earns his father’s praise only when he admits what he has done. Even though we know that “honesty is the best policy,” why do we often lie in our everyday life? The fact is that we lie for many reasons. We sometimes lie to minimize (将??最小化) our errors and mistakes. For example, some students might lie to their teachers about unfinished homework. They might say that they left the work at home when, in fact, they didn’t even do the work. These students don’t want to be irresponsible (无责任感的), so they make up a lie to save face. Another reason we lie is to get out of situations we don’t want to be in. If we just don’t want to attend the dorm meeting early on Saturday morning, we might give the excuse: “I’ve been fighting off a cold all week, and I need to sleep on Saturday morning.” We lie because we believe that telling the truth will cause problems. When we don’t know how to say no, we often use lies to avoid difficulties. However, lies are not always negative (消极的); in fact two kinds of lies can yield positive (积极的) results. The first is commonly referred to as a “white lie.” We tell white lies when we don’t want to hurt other people’s feelings. For example, if a good friend shows up with an unflattering (难看的) haircut, we could be truthful and say, “That haircut is awful. It doesn’t suit you at all!” Instead, we are more likely to lie and say, “I like your haircut. It looks good on you,” and spare our friend’s feelings. The second kind of positive lie is the “protective lie.” This one can help us get out of or avoid dangerous situations. Parents often teach their children to use this kind of lie. For example, parents tell their children not to say that they are home alone if they receive phone calls from strangers. In this situation, lying can prevent harm or disaster. People lie for many reasons, both good and bad. However, before we resort to (采用) lying to cover up mistakes or to avoid unpleasant situations, perhaps we should rethink our motives (动机) for lying.

1. What is mainly discussed in this passage? A. The importance of telling the truth. B. Positive and negative results produced by lies. C. The reasons or motives for telling lies. D. How to stop telling lies.

2. 2. Which of the following is a “white lie” according to the passage? A. A lie told by a student to his teacher about unfinished homework. B. A lie told by someone who wants to avoid hurting others. C. A lie told by child to avoid an unfavorable situation. D. A lie told by a boy who cried wolf. 3. Why do some students lie to their teachers about their unfinished homework? A. Because they want to minimize their mistakes. B. Because they have no idea about the virtue of honesty. C. Because they have left their homework at home. D. Because they don’t have a sense of responsibility. 4. Which of the following can be regarded as an “unflattering haircut”? A. A haircut that is pleasant to the eye. B. A haircut that suits somebody well. C. A haircut that does not look good on someone. D. A haircut that is fashionable and popular. 5. Which of the following statements is NOT true according to the passage? A. People tell lies in order to maintain their relationship. B. Telling the truth may cause problems on some

occasions. C. “Protective lies” can help us get out of dangerous situations. D. Lies do not always produce negative results. :assage 2 Psychological research has focused on a number of basic principles that help memory: meaningfulness, organization, association, and visualization. It is useful to know how there principles work. Meaningfulness affects memory at all levels. Information that does not make any sense to you is difficult to remember. There are several ways in which we can make material more meaningful. Many people, for instance, learn a rhyme to help them remember. Do you know the rhyme \days has September, April, June, and November...\It helps many people remember which months of the year have 30 days. Organization also makes a difference in our ability to remember. How useful would a library be if the books were kept in random order? Material that is organized is better remembered than jumbled information. One example of organization is chunking. Chunking consists of grouping separate bits of information. For example, the number 4671363 is more easily remembered if it is chunked as 467, 13, 63. Categorizing is another means of organization. Suppose you are asked to remember the following list of words: man, bench, dog, desk, woman, horse, child, cat, chair. Many people will group the words into similar categories and remember them as follows: man, woman, child; cat, dog, horse; bench, chair, desk. Needless to say, the second list can be remembered more easily than the first one. Association refers to taking the material we want to remember and relating it to something we remember accurately. In memorizing a number, you might try to associate it with familiar numbers or events. For example, the height of Mount Fuji in Japan -12,389 feet -might be remembered using the following associations: 12 is the number of months in the year, and 389 is the number of days in a year (365) added to the number of months twice (24). The last principle is visualization. Research has shown striking improvements in many types of memory tasks when people are asked to visualize the items to be remembered. In one study, subjects in one group were asked to learn some words using imagery, while the second group used repetition to learn the words. Those using imagery remembered 80 to 90 percent of the words, compared with 30 to 40 percent of the words for those who memorized by repetition. Thus forming an integrated image with all the information placed in a single mental picture can help us to preserve a memory. 1. What kind of information is easy for us to remember? A. Information that does not make any sense to us. B. Information that we are not familiar with. C. Information that is meaningful to us. D. Information that we are not interested in. 2. Which of the following pairs are rhymes? A. horse—house B. right---white C. come----home D. how---low 3.The second list of words in para.3 is organized according to . A. the rhyme B. the word category C. the first letters of words D. the meanings 4. Books are kept in a library . A. according to their size B. in random order C. in a jumbled way D. in different categories 5. What method can better help form a whole mental picture about the tings to be remembered? A. Grouping B. Repetition C. Imagery D. Association Passage 3 One day, the principle(校长) came into our room and, after talking to the teacher, for some reason said: “I wish all of the white students to stand for a moment.” I rose with the others. The teacher looked at me and, calling my name, said: “You sit down for the present, and rise with the others.” I did not quite understand her. She repeated: “You sit down now, and rise with the others.” I sat down puzzled. I saw and heard nothing. When the other were asked to rise, I did not know it. When school was dismissed, I went out unconsciously. A few of the white boys laughed at me, saying: “Oh, you’re a nigger, too.” I hurried on as fast as I could to where my looking-glass hung on the wall in my own little room. For an instant I was afraid to look, but when I did, I looked long and

earnestly. I was accustomed to hearing remarks about my beauty, but now, for the first time, I became conscious of it and recognized it. I noticed the ivory(象牙) whiteness of my skin, the beauty of my mouth, the size and the liquid darkness of my eyes. I ran downstairs and rushed to where my mother was sitting. I buried my head in her lap and cried out: “Mother, tell me, am I a nigger?” I could not see her face, but I felt her hands on my head. I looked up into her face. There were tears in her eyes and I could see that she was suffering for me. And then it was that. I looked at her critically for the first time. I had thought of her in a childish way only as the most beautiful woman in the world; now I looked at her searching for defects(缺点) .I could see that her skin was almost brown, and that she did differ in some way from the other ladies who came to the house; yet, even so I could see that she was more beautiful than any of them. She must have felt that I was examining her, for she hid her face in my hair and said with difficulty: “No, my darling, you are not a nigger.” She went on: “If anyone calls you a nigger, don’t notice them.” But the more she talked, the less was I reassured, and I stopped her by asking:“Well, mother, am I white? Are you white?” She answered tremblingly(颤抖的): “No, I am not white, but your father is one of the greatest men in the country. The best blood of the South is in you.” This suddenly opened up in my heart a fresh fear, and I almost fiercely demanded: “Who is my father? Where is he?” She stroked my hair and said: “I’ll tell you about him some day.” I sobbed(抽泣): “I want to know now.” She answered: “No, not now.” 1.We can infer from the passage that “a nigger ”means________. A. a white person B. a black person C. anyone that is not white D anyone that is not black 2.When the teacher asked him to sit down and rise with the others ,the author was confused because___. A. he never considered himself a non-white person B. he thought the teacher didn’t recognize him C. he thought he should be considered D. he thought it rude for the teacher to call his name 3.It was on that day that he began to realize that _________. A. he was a nigger B. he was different from others because of his beauty C. his color was like that of his mother D. he differed from other white people even with his beauty 4.From the passage we can learn that _________. A. the boy’s father left them for some reasons B. the boy’s mother didn’t want to mention his father at all C. the boy never met his father before D. the boy’s mother hated his father 5.This passage generally tells us a story of ________. A. a boy who suddenly realized that he was a colored person B. a boy who had been looked down upon because he had no father C. the miserable life of colored people D. the life of a one-parent family 释疑：【passage|1：CBACA |2：CBBDC |3：BADCA 】

2/Passage 1 Upon reaching an appropriate age (usually between 18 and 21 years), children are encouraged, but not forced, to “leave the nest” and begin an independent life. After children leave home they often find social relationship and financial support outside the family. Parents do not arrange marriages for their children, nor do children usually ask permission of their parents to get married. Romantic love is most often the basis for marriage in the United States; young adults meet their future spouses (配偶) through other friends, at jobs, and in organizations and religious institutions. Although children choose their own spouses, they still hope their parents will approve of their choices. In many families, parents feel that children should make major life decisions by themselves. A parent may try to influence a child to follow a particular profession but the child is free to choose another career. Sometimes children do precisely the opposite of what their parents wish in order to assert their independence. A son may deliberately

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