问题
选择题
— There is somebody at the door. ________ it be Tom?
— No, it _______ be him. It’s just six o’clock. It’s too early.
A．May; can’t
B．Will; won’t
C．May; mustn’t
D．Must; may not
答案
答案：A
此题重点考查情态动词的基本用法。
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