30的所有因数有______．

情景交际

根据对话内容，从下面方框中选出五个适当的句子补全对话，并在答题卷上按要求作答。其中有两项是多余的。

A: Hello! May I speak to Mr. Smith?

B: I’m sorry.      1   I think he will come back in an hour.    2   

A: That’s very kind of you. I’d like him to come to my birthday party.     3

B: OK. Wait a minute, please! I’ll go and get a pen and a piece of paper. OK.    4

A: 8765432. My name is Li Bai.

B: All right.   5