问题
选择题
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
D。
“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。
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