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31. Do you know when did the world _____?

   A. come into being     B. come            C. formed         D. existed

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30. The coal we use today should _____ plants and trees.

   A. begin with         B. start with         C. commence as      D. originate as

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29. That's all for the party. Let's _____.

   A. fall asleep        B. go to sleep        C. go to bed         D. be asleep

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28. They ____ friends since they met in Shanghai ten years ago.

   A. have become          B. have turned           C. have been         D. have grown

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27. When he heard the news, his heart ______ very fast.

   A. stroke          B. beat            C. knocked         D. jumped

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26. The old woman could not _____ the terrible noise, and she had to close the door and windows.

   A. bear           B. accept           C. receive          D. hold

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25. --- We could have walked to the station. It was so near.

--- Yes. A taxi ____ at all necessary.

A. wasn’t          B. hadn’t been        C. couldn’t be    D. wouldn’t be

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24. The valley was _____ in sunlight, and the children were singing and jumping with joy

    A. bathed               B. covered           C. swam            D. surrounded

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23. Everyone should remember it is very important to _____ the balance of nature toady.

A. get              B. make            C. keep             D. remain

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22. She always ____ her opinion ____ facts.

   A. depends, on        B. bases, on         C. put, into          D. bases, by

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