Question

【题目】The boy was so tired that he fell asleep ________ his mother could take off his clothes.

A. before B. after C. while D. when

Answer 1

【答案】A

【解析】试题分析：句意：这个男孩太累了，以至于在他的妈妈给他脱衣服之前，他就睡着了。Before在……之前 after在 …… 之后 while然而 when当…… 时候，选A。