Mary is so wet. She in the rain.A. must be caughtB. must have been caughtC. should have

问题补充：

Mary is so wet. She in the rain.

A. must be caught

B. must have been caught

C. should have been caught

D. can have been caught

答案：

A. must be caught

(答案→)B. must have been caught

C. should have been caught

D. can have been caught

解析：

这题考查情态动词表示对过去情况的推测的用法，根据Mary is so wet.玛丽淋湿了，推测一定是过去遭雨了，must have done 就是对过去的肯定推测。所以选B。