题目内容
9.Where and why he came here ______ yet.( )A. | is not known | B. | are not known | ||
C. | has not known | D. | have not been known |
分析 不对
解答 答案是A.考查被动语态,where and why he came here是主语从句,一个句子做主语谓语动词用单数形式,本句是指
点评 被动语态由"助
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