“We didn’t see him at the lecture yesterday.” “He ______ it.”

“We didn’t see him at the lecture yesterday.” “He ______ it.”
A、mustn’t attend
B、cannot have attended
C、would have not attended
D、needn’t have attended
【正确答案】：B
【题目解析】：此处表示否定的推测，mustn't do 是指禁止做某事，cannot have done 表示对过去的推测，绝不可能，符合题意would have not done表示本不应该做某事 ，needn’t have done暗示已经做了，有“本不需要”的意思.只有B 符合题意。