题目内容

I really don’t know____________.
A．how to doB．what to doC．what should I doD．how I should do
B
此题考查疑问词和动词不定式连用充当简单句的某个句子成分。“疑问词 + 动词不定式”是英语中常用的一种结构。在句中可以作主语、动词或介词的宾语以及表语。
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