题目内容：

根据下面的对话内容，在对话的空白处填上恰当的表达，使其意思通顺、合理、结构完整。

A: Hi , Tony . I didn't see you last Sunday . Did you go on a school trip ?

B: 1._____________________________. I stayed at home .

A: Oh, really ? 2.__________________________?

B: Because I had a lot of thing to do.

A: 3._____________________________ ? 

B: I cleaned my room and did my homework . Then I watched TV .

A: Not much fun , I think .

B :Well , it wasn't very bad . I played basketball that afternoon . Was the school trip interesting ?

A: 4.____________________________ . We went to the park and the zoo. We flew kites in the park .We had a very good time .

B: 5.____________________________?

A: We came back at about 5:30 in the afternoon .