You are wet through . You in the rain . A. must comeB. must be caughtC. must have caught

问题补充：

You are wet through . You in the rain .

A. must come

B. must be caught

C. must have caught

D. must have got caught

答案：

A. must come

B. must be caught

C. must have caught

(答案→)D. must have got caught

解析：“must +不定式的完成式”表示对过去发生行为的肯定推测，只用于肯定句。句4中，be / get caught in a rain 为一个固定搭配。