问题
选择题
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
答案
答案：A
题目分析：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。