We must keep our room clean. Dirt and disease go , you know.

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• 1During the ten-day vacation, they traveled to France their own expense

  A. on B. with

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• 2 If human beings had been a bit less greedy and cruel, more birds and animals dying out.

  D本题涉及虚拟语气的使用，从if引导的从句分析可以知道与过去相反，should have done表示本来不应该但实际上干了，不符合题意。

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  A. as B. while

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• 4 I don't skate now, but I___________ when I was a kid.

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• 5 He didn’t seem to mind_____________ TV while he was trying to study

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• 6 Flight BA 123 to Vienna is now boarding at

  A. Gate 21 B. 21St Gate

  C. the Gate 21 D. 21 Gate

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• 7 —He isn’t particular about his food.

  A. nearly B. mostly

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• 8 __________ you understand the rule, you will have no further difficulty.

  A. While B. Once

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• 9 Jack is one of those men who_________ best evening the most difficult situations.

  A. his B. your

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• 10 --Whose advice do you think I should take? --___________.

   

  A. You speak

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