问题补充:
—Has Ham started out? He said he would join in the party.
—He . He is a man who always keeps his word.
A. must have left
B. need have left
C. should have left
D. could have left
答案:
(答案→)A. must have left
B. need have left
C. should have left
D. could have left
解析:考查情态动词+have done,A是过去一定做了,B是过去本有必要做却没做,C是过去本应该做却没做,D是过去本可以做却没做,句意是:--Ham出发了吗?--他说他会参加聚会的。--他一定已经走了,因为他是守信的人。选A。