单选题During the past ten years, there have been ______ changes in the country.

单选题Many children, ______ parents are away working in big cities, are taken good care of in the village.

单选题The girl immediately shut the window to ______ the rain.

单选题Dr. Robert went to New York, bought some books and ______.

单选题If you put your money into that business you risk ______ every penny.

单选题I can't stand ______ with Jane in the same office. She just refuses ______ talking while she works.A. working; stoppingB. to work; stoppingC. working; to stopD. to work; to stop

单选题Speaker A: Do you mind ______? All the other tables seem to be full. Speaker B: Not at all. Speaker A: Thanks. I'm Roger Smith, and this is Anne Williams. Speaker B: Nice to meet you. I'm Ed Walker. A. if we join you B. if we will join you C. if we are to join you D. if we joined you

单选题Other medical technology groups are working on ______ telemedicine to rural care,A. applying B. supplying C. replying D. implying

单选题The bank charges 6 percent ______ on all money borrowed from it.

单选题__________ English, she is studying Japanese and French.

单选题He ______ a sum of money every week for his old age.A. sets up B. sets out C. sets against D. sets aside

单选题The drama school ______ places to students who can show talent.

单选题As the school year kicks off, parents are once again struggling 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. (77) Teenagers who don't get enough rest have more learning, health, behavior and mood problems than 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 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-school and high-school students, University of Colorado researchers found that 82 percent said they woke up tied and unrefreshed, 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 internet, video games, phone calls and text message 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. Their body's internal clock, which controls when 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 beings before 8:15 am., with many high schools starting at 7:15 am. To get to school on time, most teens have to get up by 6:30 am, guaranteeing they'll be sleep-deprived during the week. Teens often sleep much later on weekends to catch up, making it even harder to fall asleep on Sunday night and wake up Monday morning. Playing catch-up on weekends also doesn't help teens stay refreshed when they need it most: during the week at school. Since the 1990s, middle and high school in more than two dozen states have experimented with later school start times. (78) The results have been encouraging: more sleep, increased attendance, better grades and fewer driving accidents. But most school still start early, meaning teens have their work cut out for them if they want to get enough sleep.

单选题The doctor will not perform the operation ______ it is absolutely necessary.

单选题The decline in moral standards—which has long concerned social analysts—has at last captured the attention of average Americans. And Jean Bethke Elshtain, for one, is glad. The fact that ordinary citizens are now starting to think seriously about the nation's moral climate, says this ethics (伦理学) professor at the University of Chicago, is reason to hope that new ideas will come forward to improve it. I But the challenge is not to be underestimated. Materialism and individualism in American society are the biggest obstacles. "The thought that I'm in it for me has become deeply rooted in the national consciousness," Ms. Elshtain says. Some of this can be attributed to the disintegration of traditional communities, in which neighbors looked out for one another, she says. With today's greater mobility and with so many couples working, those bonds have been weakened, replaced by a greater emphasis on self. In a 1996 poll of Americans, loss of morality topped the list of the biggest problems facing the U. S.. And Elshtain says the public is correct to sense that: data shows that Americans are struggling with problems unheard of in the 1950s, such as classroom violence and a high rate of births to unmarried mothers. "The desire for a higher moral standard is not a lament (挽歌) for some nonexistent golden age," Elshtain says; "nor is it a wishful (一厢情愿的) longing for a time that denied opportunities to women and minorities. Most people, in fact, favor the lessening of prejudice. " "Moral decline will not be reversed until people find ways to counter the materialism in society," she says. " Slowly, you recognize that the things that matter are those that can't be bought. /

单选题Most of us trade money for entertainment.Movies, concerts and shows are enjoyable but expensive. (78) If you think that you can't have a good time without spending a lot of money, read on. A little resourcefulness and a few minutes of newspaper-scanning should give you some pleasant surprises. People may be the most interesting show in a large city. Stroll through busy streets and see what everybody else is doing.You will probably see people from all over the world; you will certainly see people of every age, size, and shape, and you'll get a free fashion show, too.Window- shopping is also a safe sport--if the stores are closed. Check the listings in your neighborhood paper.Local colleges or schools often welcome the public to hear an interesting speaker or a good debate.The film or concert series at the local public library probably won't cost you a penny.Be sure to check commercial advertisements too.A flea market can provide hours of pleasant browsing.Perhaps you can find a free cooking or crafts in a department store. Plan ahead for some activities.It is always more pleasant not to have people in front of you in a museum or at a zoo.You may save some money, too, since these places often set aside one or two free admission days at slow times during the week. (79) Pretend that you are a tourist from time to time, and get to know your city all over again including the indispensable (不可错过的) sights that people travel miles to see. If you feel like taking an interesting walk, find a free walking tour, or plan one yourself.You will see your city in a new perspective (视角) once you know more about its history or its architectural treasures.With imagination and a spirit of adventure you can quite easily find good entertainment at no cost at all.

单选题Waiter: Welcome, sir. May I help you? Customer: ______

单选题Speaker A: You don't care if we use your room this Sunday to hold a surprise party for Meg? Speaker B: ______ I am going downtown this coming weekend anyway. A. Meg? Who is Meg? B. Yeah. But you must do it now. C. No problem. D. This Sunday must be all right.

单选题At present time, people have a trend to live in the ______.