题目内容
When the fire broke out, Mary didn’t know .
A. what do B. what thing to do
C. what to do D. to do what
C
what to do为不定式结构,what作to do的宾语。
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题目内容
When the fire broke out, Mary didn’t know .
A. what do B. what thing to do
C. what to do D. to do what
C
what to do为不定式结构,what作to do的宾语。