Who is the man over there?Is it Mr Li?No,it___be him.Mr Li is much taller.
问题描述：
Who is the man over there?Is it Mr Li?No,it___be him.Mr Li is much taller.
A.can’t B.may not C.mustn’t D.needn’t
答
A
肯定推测用must,否定推测用can't(不可能)