-David,is that man your head teacher?It____be him.he's the tallest in our school.A.mustn't B.can't C.needn't D.won't为什么

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-David,is that man your head teacher?It____be him.he's the tallest in our school.A.mustn't B.can't C.needn't D.won't为什么
-David,is that man your head teacher?
It____be him.he's the tallest in our school.
A.mustn't B.can't C.needn't D.won't
为什么

-David,is that man your head teacher?It____be him.he's the tallest in our school.A.mustn't B.can't C.needn't D.won't为什么
选B 意思是不可能
must无否定,needn't是不需要,won't将不.

c

b

A

A.表示禁止做某事
B.表示猜测
C.表示不需要
D.表示未来不会做某事

选B啊,只有B说得通