Question

【题目】I don't know_______ now.

A. how to do B how to do it C. what to do D. B and C

Answer 1

【答案】D

【解析】句意：现在我不知道怎么办。作为动词know的宾语，用疑问词+to do，动词do后面缺少宾语，用疑问词what充当；用疑问词how时，动词do后面有宾语it。故选D。