题目内容
—Is Pro.Smith giving the speech today?
—It__________ be him. He is abroad right now.
| A．can’t | B．needn’t | C．won’t | D．mustn’t |
A
解析
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题目内容
—Is Pro.Smith giving the speech today?
—It__________ be him. He is abroad right now.
| A．can’t | B．needn’t | C．won’t | D．mustn’t |
A
解析