Look!It is very sunny now.I think it ______be rainy.

问题描述:

Look!It is very sunny now.I think it ______be rainy.
A.mustn't B.can't C.needn't

选B A选项是不允许,禁止之意
C选项是不需要
B选项表示不会 不应该 很确定的否定意思