[单项选择]Who should sign up
A. Only students who have time for the work.
B. All the students who are at the meeting.
C. Only students who have a telephone.

[单项选择]Who should sign up A. Only students who have time for the work. B. All the students who are at the meeting. C. Only students who have a telephone.

[单项选择]Who should sign up[A] Only students who have time for the work.[B] All the students who are at the meeting.[C] Only students who have a telephone.

[单项选择] How Should You Build up Your Vocabulary Exactly what do you do during a normal day How do you spend your time Paul T. Rankin very much wanted an answer to that question. To get it, he asked sixty-eight individuals to keep an accurate, detailed record of what they did every minute of their waking hours. When he consolidated (巩固) his findings, he discovered that the average individual spent 70 percent of his waking time doing one thing only--communication. That meant either reading, writing, speaking or listening. Put that evidence alongside of the research findings uncovered by the Human Engineering Laboratories. In exploring aptitudes and careers involving, among other things, data from 30,000 vocabulary tests given yearly, they discovered that big incomes and big vocabularies go together. Vocabulary, more than any other factor yet known, predicts financial success. And it all fits. Each word you add to your vocabulary makes you a better reader, writer, speak
A. Y
B. N
C. NG

[单项选择]Who should be helped

[单项选择]What should the man give up
A. Coffee.
B. Tea.
C. Cakes.
D. Sugar.

[单项选择]Students must sign up for classes this week in order to avoid ______ late fees.
A. paid
B. pay
C. to pay
D. paying

[单项选择]Researchers who picked up and analyzed wild chimp droppings said on Thursday they had shown how the AIDS virus originated in wild apes in Cameroon and then spread in humans across Africa and eventually the world. Their study, published in the journal Science, supports other studies that suggest people somehow caught the deadly human immunodeficiency virus (HIV) from chimpanzees, perhaps by killing and eating them.
"It says that the chimpanzee group that gave rise to HIV... this chimp community resides in Cameroon," said Beatrice Hahn of the University of Alabama, who led the study. "But that doesn’t mean the epidemic originated there because it didn’t," Hahn, who has been studying the genetic origin of HIV for years, said in a telephone interview.
"We actually know where the epidemic took off. The epidemic took off in Kinshasa, in Brazzaville." Kinshasa is in the Democratic Republic Congo, formerly Zaire, and faces Brazzaville, in Congo, across the Congo River. Studies have
A. monkeys are also susceptible to HIV.
B. ADS has killed 25 million people in the last 25 years.
C. vaccine has been developed to prevent AIDS.
D. AIDS can be cured by drug cocktails.