【題目】The physics problem is so hard.I really don’t know .

A. what to do it B. how to do it

C. what do it D. how to do

【答案】B

【解析】

句意“這個物理題太難了,我真的不知道怎么做”。本題考查“疑問詞+to do”作賓語,排除C。what是疑問代詞,作do的賓語,排除A。how為疑問副詞,D項缺少賓語,故選B。

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