北大15春《大学英语3》作业四.docx

1、北大15春大学英语3作业四北大15春大学英语3作业四1.鼓励自主完成，严惩抄袭。Mr. Obama will give a speech on the current situation at the meeting _ next week in Beijing. A. A. to holdB. B. heldC. C. holdingD. D. to be held2.It was in a small village in the south _he spent his childhood and met his life-long friend the local schoolmaste

2、r. A. A. whereB. B. whenC. C. whichD. D. that3.I think fishing is a nice hobby but needs a good deal of _.A. A. relationB. B. limitationC. C. strengthD. D. patience4.Finally we made a _ that I should cook dinner and she would wash up after.A. A. tripB. B. bargainC. C. faceD. D. fool5.First of all, a

3、 teacher should show love for his students on top of his academic knowledge. _ , he is not qualified for his position.A. A. ThereforeB. B. OtherwiseC. C. HoweverD. D. Because6.For many overseas Chinese, China is their real _ , because they were born and grew up there.A. A. homeB. B. familyC. C. hous

4、eD. D. household7.Do you know the_ of the saying I just quoted?A. A. resourceB. B. sourceC. C. courseD. D. cause8.The Internet has brought_ big changes in the way we work.A. A. aboutB. B. outC. C. upD. D. back9.If only I _ hard in the past few months! But I didnt work hard enough and failed the math

5、 examination.A. A. workB. B. workedC. C. have workedD. D. had worked10.None of us knew how the change had come _.A. A. acrossB. B. aboutC. C. overD. D. down11.The number of members in the club_ to two hundred.A. A. were limitedB. B. limitsC. C. was limitedD. D. limited12.There are many fashion shops

6、 and expensive restaurants on _ sides of the street.A. A. allB. B. eachC. C. bothD. D. every13.I went to_ London yesterday and saw _strange old man and a little girl, begging by the roadside.A. A. /; aB. B. a; /C. C. /; theD. D. the; /14.Speak louder so that you can make yourself _.A. A. heardB. B.

7、to hearC. C. hearingD. D. have been heard15.Now it wont be long before we meet again, _?A. A. will itB. B. do weC. C. wont weD. D. does it16.请在以下句子划线部分中，挑出错误的选项。The harder he tried, the most failures he suffered in his early days as a writer.BA. A. The harderB. B. the most failuresC. C. sufferedD. D

8、. as a writer17.Only under special circumstances freshmen are permitted to take make-up tests.A. A. underB. B. circumstancesC. C. freshmen areD. D. to take18.It was until after his death that he was recognized as a great composer.A. A. It was untilB. B. thatC. C. was recognizedD. D. a great composer

9、19.You can arrive in Beijing earlier for the meeting though you dont mind taking the night train.A. A. canB. B. earlierC. C. thoughD. D. taking20.Why not stay at home since that the road is so slippery after the heavy snow?A. A. Why notB. B. since thatC. C. isD. D. heavy snow21.请阅读以下文章，回答文章后的五个小题。每个

10、小题只有一个最佳选项。As the school year kicks off, parents are once again straggling to cajole (哄骗) and, if need be, drag their exhausted teens out of bed. That image may make you laugh, but lack of sleep is no joke. Teenagers who dont get enough rest have more learning, health, behavior and mood problems tha

11、n students who get at least nine hours a night. Long-term lack of sleep is tied to heart disease, overweight, depression and a shortened life span in adults, indicating the importance of establishing good sleep habits early in life. Lack of sleep can be especially deadly for teens; car accidents are

12、 the leading cause of death among teenagers, and safety experts believe sleepy driving is a major factor.Unfortunately, few teenagers get the sleep they need. In a survey of middle- and high-school students, University of Colorado researchers found that 82 percent said they woke up tired and unrefre

13、shed, and more than half had trouble concentrating during the day at least once a week.Blame multitasking for some of this. Many students are juggling after-school activities, homework and part-time jobs. Even when they manage to fulfill these obligations by a reasonable hour, television, the Intern

14、et, video games, phone calls and text messages to friends often keep them awake deep into the night. Taking soda and energy drinks late in the day and going to late-night parties on weekends add to sleep debt. Biology also works against teenagers sleep, The bodys internal clock, which controls when

15、a person starts to feel tired, shifts after puberty (青春期), making it hard for most teens to fall asleep before 11 pm. Class usually begins before 8:15 am, with many high schools starting as early as 7:15 am. To get to school on time, most teens have to get up by 6:30 am, guaranteeing theyll be sleep-deprived during the week. Teens often sleep much later on weekends to catch up, making it even harder to fall asleep on