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Only then __________th
单选题 Only then __________that she had made a mistake.

A.she realized

B.did she realize

C.had she realized

D.she had realized

正确答案: B

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答案解析: 本题考查倒装句型。句意:只有到那个时候,她才意识到自己犯了个错误。以“only+状语或状语从句”开头的句子要用倒装结构,即把助动词放在主语前。then意为“那时”,表示过去,所以要用一般过去时。



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