John ___ come to see us tonight,but he isn't very sure yet.

问题描述:

John ___ come to see us tonight,but he isn't very sure yet.
A.may
B.can
C.has to
D.must
选择原因?

A,后面半句表示他不去定能不能过来,用MAY ,表示一种不确定的含义,整句翻译过来就是,john今晚有可能来看我们,但是他还不是很确定.