People can live without food or water for____. [br] When we are sleeping we_

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问题 People can live without food or water for______. [br] When we are sleeping we______.

选项 A、need less air
B、need more air
C、don’t need air at all

答案 A

解析根据第二段最后一句When we are asleep，we need less air．可知睡觉的时候。我们需要的空气就较少。所以应选A。

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People can live without food or water for______. [br] When we are sleeping we___