i got close enough to hear them speaking Chinese,and i said"

问题描述：

i got close enough to hear them speaking Chinese,and i said"ni hao"just a
I got close enough to hear them speaking Chinese,and I said “Ni Hao ” just as I ____ do in China.
A.must B.might C.can D.shoul
请问C 和D项为什么不对呢?

1个回答分类：英语 2014-11-10