题干

—I think our headmaster may be at school.

—No, she _______ be there. She left for Xiamen just now.

A:mustn't

B:may not

C:can't

上一题 下一题 0.0难度 选择题 更新时间:2018-03-12 11:52:01

答案(点此获取答案解析)

C