从方框中的七个句子中选出五个句子的正确序号补全对话
A：Hi, Li Ming. What are you going to do this afternoon?
B：  1   Why?
A：Shall we go to play basketball this afternoon?
B：I’d love to, but I must do my homework at home.
A：Why don’t you do it tomorrow?
B：Sorry.   2 
A：You are right.   3 
B：I think so.   4 
A：OK. That’s a good idea.
B：  5 
A：We are going to meet outside
the school gate at nine o’clock.
B：OK. See you tomorrow.
A：See you.