题目内容
---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
A. can’t B. mustn’t
C. couldn’t D. may not
练习册系列答案
相关题目
题目内容
---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
A. can’t B. mustn’t
C. couldn’t D. may not