情景交际。

根据对话的情景，从方框中选择适当的句子填在画线处，使对话完整通顺(两项多余)。

A: Hi Yang Yingxue.  1 

B: I’m reading a book.

A: Oh do you like reading?

B: Yes very much.  2

A: I like playing the guitar.

B: Good. By the way(顺便问一下) 3 

A: It’s easy and interesting. I like it a lot.

B: But I think it’s difficult and boring.  4   I like math best.

A:   5

B: Because I think it’s useful (有用的) and interesting.