The boy was so tired that he fell asleep ______ his mother could take off his clothes.A.beforeB.afte

题目简介

The boy was so tired that he fell asleep ______ his mother could take off his clothes.A.beforeB.afte

题目详情

The boy was so tired that he fell asleep ______ his mother could take off his clothes.
A.beforeB.afterC.whileD.when
题型:单选题难度:中档来源:不详

答案

A
句意:这个小男孩如此的累以至于他的母亲还没来的及给他脱衣服他就睡着了。before 作为还没来得及之意时,常与情态动词could 连用。故选A。

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