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Not until Mr. Smith came to China ___ what kind of a country she is.
A.did he know B.he knew
C.he didn't know D.he could know
A

试题分析:考查倒装句:句意:直到斯密斯先生来到中国,他才知道这是什么样的国家。Not until Mr Smith came to China置于句首,主句要部分倒装。助动词did放在主语前面,应该选A。
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