Question

【题目】When Mary arrived she found all her children ______ for nearly two hours.

A. have gone to sleep B. fell asleep

C. was falling asleep D. had been asleep

Answer 1

【答案】D

【解析】

试题分析：考查时态的辨析。这里选用过去完成时，表示事件发生在过去的过去，由found，我们可以发现是过去时态，但是孩子睡着这件事发生在她发现之前，故为过去的过去，句意为：当Mary到达时，她发先孩子们已经睡了将近两个小时。故选D。