【題目】There are so many foggy days these days. We all want to know ___________.

A. what can we do to prevent it

B. how to prevent it

C. we can do anything to prevent it

【答案】B

【解析】

試題分析：句意：這些天有如此多的霧，我們都想知道怎樣阻止它。本題考查疑問詞+to do的形式。根據(jù)題意，故選B。

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