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: _____________________________. I stayed at home .
A: Oh, really ? __________________________?
B: Because I had a lot of thing to do.
A: _____________________________ ? 
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: ____________________________ . We went to the park and the zoo. We flew kites in the park .We had a very good time .
B: ____________________________?
A: We came back at about 5:30 in the afternoon .