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
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
D
推测“她不可能在会上发言”，must表示推测时，不能用于否定句中。