题干

—The man at the gate _______ be our headmaster. He is always standing there every morning.

—No, it _______ be him. He is holding a meeting in the office now.

A:must; can't

B:must; mustn't

C:can't; can't

D:can't; mustn't

上一题 下一题 0.0难度 选择题 更新时间:2019-05-21 12:24:24

答案(点此获取答案解析)

A