题干

— Listen! Someone is knocking at the door. Who can it be?

— It _______ be Tom. He said he would visit me this evening.

A:can't

B:need

C:must

D:mustn't

上一题 下一题 0.0难度 选择题 更新时间:2010-07-13 07:25:36

答案(点此获取答案解析)

C