Question

It_____ years ago when the incident took place, and I nearly forget it.

A．would have been	B．should have been
C．ought to have been	D．must have been

Answer 1

D

试题分析：考查情态动词+完成式的用法：句意：那一定是在很多年前发生的事情，我几乎要忘了。Must have done过去一定做了，would have done过去会做但是没有做，should have done本应该做却没做，ought to have done过去本应该做却没有做，选D。