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3. 我们总是保持教室清洁。

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5. The only wonder is that so many states insist on closing their ears to the message. Tobacco taxes improve public health. They raise money and most particularly,they deter people from taking up the habit as teens,which is when nearly all smokers are addicted. Yet the rate of taxation varies widely.(   )

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8. Instead of praising your kids for their intelligence,you should       (集中) your praise on the effort they put into succeeding at the task,experts say.

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5. I can’t        (匹配) him in the knowledge of wild plants. As a matter of fact,he’s an expert.

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1. [原文]Herpin remembered some talk about his mother having been injured several days before he was born.

[问题] One reason that might explain Herpin’s sleepless ness was        .

   A. his mother’s injury before he was born

   B. that he had gradually got rid of the sleeping habit

   C. his magnificent physical condition

   D. that he hadn’t got a bed

[答案]        

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2. Try not to cough more than you can      since it may cause problems to your lungs.

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9. Your daughter would        a famous singer—she has a great gift for music.

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7. —Oh,doctor,the wound on my leg is infected.

—You really shouldn’t have left it       (暴露) to the sun.

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9. 一Do you know why Jeff resigned from the firm?

—He held out for higher wages,but was      (turn) in the end.

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