题目内容
---Who is crying in the next room?
---It ____ be Timmy. He is sleeping now.
A. can’t B. may not C. mustn’t D. couldn’t
A
练习册系列答案
相关题目
—Hi, Mary. __________?
—Not so well. I can’t keep up with the other students.
| A.How long have you studied chemistry |
| B.Who is teaching you chemistry |
| C.How is your chemistry study going |
| D.Where are you learning chemistry |