Not until I came to China ______ what kind of country it is.

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问题 Not until I came to China ______ what kind of country it is.

选项 A、I knew
B、I didn’t know
C、I did know
D、did I know

答案D

解析 倒装结构。not until置于句首时,其后的主谓结构要倒装。
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