高等教育 / 大学英语4
(单选题) Not until Mr. Smith came to China _ _ _ _ _ what kind of country she is from.
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：
佳题速递：