Scientists are not sure why we need sleep．

试卷相关题目

• 1Going without sleep is not dangerous for white rats．

  A.Right

  B.Wrong

  C.Not mentioned

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• 2It took four days for Gardner to recover from the effects of the experiment．

  A.Right

  B.Wrong

  C.Not mentioned

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• 3During the experiment，Gardner had trouble speaking clearly．

  A.Right

  B.Wrong

  C.Not mentioned

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• 4During the experiment，Gardner slept for two hours every night．

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Randy Gardner studied the effects of over-sleeping．

  A.Right

  B.Wrong

  C.Not mentioned

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• 6People sleep less than they used to．

  A.Right

  B.Wrong

  C.Not mentioned

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• 7Paragraph 2__________.

  A.Dream of running hard

  B.Dream of falling down

  C.Dream of being pushed away

  D.Dream of flying into the air

  E.Dream of climbing trees

  F.Dream of diving into the water

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• 8Paragraph 3__________.

  A.Dream of running hard

  B.Dream of falling down

  C.Dream of being pushed away

  D.Dream of flying into the air

  E.Dream of climbing trees

  F.Dream of diving into the water

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• 9Paragraph 4__________.

  A.Dream of running hard

  B.Dream of falling down

  C.Dream of being pushed away

  D.Dream of flying into the air

  E.Dream of climbing trees

  F.Dream of diving into the water

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• 10Paragraph 5__________.

  A.Dream of running hard

  B.Dream of falling down

  C.Dream of being pushed away

  D.Dream of flying into the air

  E.Dream of climbing trees

  F.Dream of diving into the water

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