A: 不变
B: 缓慢上升
C: 缓慢下降
D: 大幅上升
根据对话内容回答问题
A: Hello! Is that Mike?
B: No. This is Tom.
A: Hi, Tom. This is John. How are you?
B: Fine, thanks.
A: Is Mike in?
B: Sorry, he isn't. He's at school.
A: OK. Thank you. Bye—bye!
B: Bye!
除数是5,余数最大是____。