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1.Research findings show wo spend about two hours dreaming e

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1.Research findings show wo spend about two hours dreaming every night,no matter what we __D__ during the day.
A.should have done B.would have done
C.must have done D.may have done
2.A bicycle __A__ by electric power,which does good to the environment,becomes quite popular in our city.
A.driven B.being driven C.to be driven D.is driven
1.Research findings show wo spend about two hours dreaming e
1 A带有责备意 是指本应该做却没做 后悔
B“would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”.
C must have done表示对已发生的事情的推测.
D may/might have done表示对过去某事可能性的推测,意为“可能已经“
附:“could+have+done”是虚拟语气,表示对过去事情的假设,意思是本来能够做某事而没有做.
2 which does good to the environment是非限制性定语从句
A bicycle drivenby electric power中省略了that 定语从句
而整个句子可看成是A bicycle that drivenby electric power becomes quite popular in our city.
还有就是 :要记住 “ ,”前后不能是两个完整的句子
being driven 是正在被骑 to be driven是将要被骑