题目内容：

the meeting has finally begun after___ A 2 hours later B 2hours of absence C 2 hours' delay
D a delay of 2 hours
请说明原因为什么选D?C也对的吧,怎么辨别它们的差别呢.

优质解答

答案选D a delay of 2 hours
delay作名词用时,前面可加不定冠词.选项C前缺少冠词a,所以不正确.