The boy couldn’t go to sleep because he _____ too long.
The boy couldn’t go to sleep because he _____ too long.
A、was talking
B、talked
C、would talk
D、had been talking
【正确答案】:D
【题目解析】:D 过去完成进行时态,过去完成进行时的语法结构是:had been doing. 表示过去某一时刻以前,一直延续的一个动作。
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