题目内容
The boy was so tired that he fell asleep _____________ his mother could take off his clothes.
A.before B.after C.while D.where
A
【解析】试题分析:考查状语从句。A..还未做。 B.在… 之后 C.当。D.地点,句意:这个男孩如此累以至于妈妈还未给他脱衣服他就睡着了。因此选D.
考点:考查状语从句
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