题目内容
---Who is at the door?
---That ____ John,I'm sure.
A.may be B.must be C.should
B
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 |