题目内容
( C ) 20. There are so many foggy days these days.
We all want to know_.
A. how can we do to prevent it
B. how we can do to prevent it
C. what we can do to prevent it
D. what can we do to prevent it
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题目内容
( C ) 20. There are so many foggy days these days.
We all want to know_.
A. how can we do to prevent it
B. how we can do to prevent it
C. what we can do to prevent it
D. what can we do to prevent it