i saw Mike in the library yesterdayyou___him;he is still abroadA.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!

i saw Mike in the library yesterdayyou___him;he is still abroadA.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!
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!

i saw Mike in the library yesterdayyou___him;he is still abroadA.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!
此题选D.C项表示过去没有能力或不可以,D项是对过去的猜测或推断,肯定式为must have done.

时态不同

选D
意思是你不可能见过他,他还在国外呢.

C D都表示对过去发生的动作的可能性推测
但按照时态应该选择C