题目内容：

补全对话 （ 6分）

A: Hi , Peter,1.                ?

B : Hi , Mike , I’m waiting for a bus .

A:  2.                    ?

B : I’m going to the bookstore . I want to buy some books .  would you like to with me ?

A : I’d like to 3.               ?

B : Books on science . Oh, here comes the bus.

B:OK. Let’s go .