I didn’t see her in the meeting-room this morning.She____at the meeting. (d)

问题描述:

I didn’t see her in the meeting-room this morning.She____at the meeting. (d)
A.mustn’t have spokenB.shoudn’t have spoken C.needn’t have spokenD.couldn’t have spoken

选D 表示不可能
A是禁止的 不可以的意思
B是本不应该的意思
C是本没必要的意思