问题补充:
I didn’t see her in the meeting room this morning. She at the meeting.
A. mustn’t have spoken
B. shouldn’t have spoken
C. needn’t have spoken
D. couldn’t have spoken
答案:
A. mustn’t have spoken
B. shouldn’t have spoken
C. needn’t have spoken
(答案→)D. couldn’t have spoken
解析:句意:今天早晨我没有在会议室看见她,她不可能在会上发言。mustn’t have spoken没有这个用法;shouldn’t have spoken表示不应该发言而发言了;needn’t have spoken没必要发言而发言了;couldn’t have spoken不可能发言。根据句意故选D。