选择下列句子完成下面对话，有两项多余。

A. I just wonder what will happen in the future. B. I am afraid I can't agree with you. C. Maybe I need to change my plan. D. It was not so good as l had expected. E. But I think history is interesting. F. It was more interesting than I had expected. G. He made the class lively.

A: What do you think of yesterday's history class, David?
B: 小题1:_________
A: Why? It is said that Mr Smith is a good teacher.
B: He talked too much.
A: That's why I like him. 小题2:_________ Besides, history is interesting itself.
B: I'm not interested in history because all the things happened in the past. 小题3:_________
A: 小题4:_________ It tells us something about our ancients(祖先).
B: 小题5:________