(单选题)

You ______ your stay in Dali, didn’t you? You look amazingly different.

A.must have enjoyed

B.should have enjoyed

C.can have enjoyed

D.enjoyed

参考答案：A

参考解析：

考查情态动词+have done的结构。句意：你一定在大理过得很愉快，对吗？你看起来非常不同。must have done意为“肯定……”，表示对过去的肯定推测；should have done意为“应该……”，表示对过去的虚拟；can have done和动词过去式不用于表示推测。根据didn’t和后文的“You look amazingly different”可知，题干表示对过去的肯定推测。故选A。

知识点：