who is the man over there?Is it Mr.liu?no,it____be him

问题描述:

who is the man over there?Is it Mr.liu?no,it____be him
a mustn`t b may not c can`t d needn`t

选C
can't 表示不可能,而且是非常肯定地“不可能”.
must 表非常肯定地 “可能”.
但mustn't 就表示“禁止”,“一定不”,语气非常强烈.