题目内容
20.The math problem is so hard,I really don't know _____.( )| A. | how to do | B. | what to do | C. | what to do it |
分析 数学问题那么难,我真的不知道做什么.
解答 答案:B.know后加"疑问词+to do"作为宾语,how是疑问副词,故how to do it,what是疑问代词,是do的宾语,故选B.
点评 本题考查了复合句和简单句的有关知识,做题时应注意正确区分简单句以及复合句,以及它们相互转化的方法.
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