单选题Wheredoesthemangethisjob?A.Atarestaurant.B.Atacompany.C.Atahotel.

单选题______ the way, I want to buy some juice too. [A] On [B] In [C] By

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单选题{{B}}Text 5{{/B}} The air surrounding us is important to everyone. Without air, we could not exist. Everyone understands that. But air is necessary in many other ways — ways that are not always so obvious or widely known. If we did not have air, there would be no sound. Sound travels through air. Where there is no air, there is no sound. Without air there would be no fire. There would be no automobiles, since motors need air in order to operate. Without air, there would be no wind or clouds. The night time would be very cold and the days very hot. We would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun's deadly rays. In this huge ocean of air surrounding the earth, there is more energy than in all the coal, oil and gas we have on the earth. Electrical energy is collected in the atmosphere as water is collected and stored in a dam (大坝). The existence of electricity in the air has been known for centuries. Men have gazed in wonder at the bright patterns of lightening in storm clouds. But thorough (彻底的，深入的) study of electricity in the air was not possible until the development of radio.

单选题Wheredoestheconversationprobablytakeplace?

单选题I can think of many cases ______ students obviously knew a lot of English words and expressions but couldn't write a good composition.

单选题WASHINGTON -- considering the serious warnings lately about Internet viruses(病毒), users may don't use their machines just to keep them safe. In reality, common sense and a few basic tips can keep Internet surfers secure. Anti-virus software is a must, and it should be updated at least once a week to recognize newly viruses. If this is not done, you will meet great troubles. People with broadband Internet connections should have also a firewall. These protect the computer from attacks by hackers(黑客). Then it is time to think about computer habits. Unlike old viruses, which spread only through shared disks, the Internet brings viruses straight to the e-mail box. ff an e-mail with attachment(附件) comes from an unknown sender, or unexpectedly from a known' sender, it should not be opened. On receiving an unexpected attachment from a friend, experts suggest a telephone call to make sure of the mail' s source before opening. If you open the mail without any consideration, you will be easily attacked by the hackers.

单选题What does the speaker want to tell his listeners?

单选题Parents often believe that they have a good relationship with their teenagers (青少年). But last summer, Joanna and Henry noticed a change in their older son: suddenly he seemed to be talking far more to his friends than to his parents. "The door to his room is always shut." Joanns noted. Tina and Mark noticed similar changes in their 14-year-old daughter. "She used to cuddle up (蜷伏) with me on the sofa and talk," said Mark. "Now we joke that she does this only when she wants something, Sometimes she wants to be treated like a little girl and sometimes like a young lady. The problem is figuring out which time is which." Before age 11, children like to tell their parents what's on their minds. "In fact, parents are first on the list." said Michael Riera, author of Uncommon Sense for Parents with Teenagers. "This completely changes during the teen years." Riera explained. "They talk to their friends first, then maybe their teachers, and their parents last." Parents who know what's going on in their teenagers' byes are in the best position to help them. To break down the wall of silence, parents should crate chances to understand what their children want to say, and try to find ways to talk and write to them. And they must give their children a mental break, for children also need freedom, though young. Another thing parents should remember is that to be a friend, not a manager, with their children is a better way to know them.

单选题The second paragraph is mainly concerned with ____________.

单选题听第6段对话，回答第6～7题。

单选题From this passage, we learn that aspirin is usually used to treat _______.

单选题I ______ a taxi when it was raining. A. used to take B. used to taking C. used to be taking D. was used to taking

单选题What was Cartier ordered to do? ______.