I'm afraid I__________a little late.A.maybe B.may be C.can't be D.can be说明理由。

I'm afraid I__________a little late.A.maybe B.may be C.can't be D.can be
说明理由。

选B
may be 作为从句的谓语.
而maybe为副词不能这样使用.
Maybe you'll have better luck next time.
也许下次你的运气会好一点.