(单选题)Not until Mr. Smith came to China _____ what kind of country she is from.(本题1.0分)
A.he knew
B.he didn.t know
C.did he know
D.he couldn.t know
出自:桂林理工大学大学英语4

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块