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题目内容
（商丘师范学院-英语口语）
(单选题) Not until Mr. Smith came to China _____ what kind of country she is from.(本题1.5分)
A、 he knew
B、 he didn.t know
C、 did he know
D、 he couldn.t know
A、 he knew
B、 he didn.t know
C、 did he know
D、 he couldn.t know
参考答案
