问题描述：
i saw Mike in the library yesterday
you___him;he is still abroad
A.must not see B.musn't have seen c.could not see D.can't have seen
请问C与D的区别是什么谢谢!
you___him;he is still abroad
A.must not see B.musn't have seen c.could not see D.can't have seen
请问C与D的区别是什么谢谢!
问题解答：
我来补答展开全文阅读