从题后方框中选出能填入空白处的最佳选项。

从题后方框中选出能填入空白处的最佳选项。
A: I need some school things. 1
B: I’m sorry, but I have to do my homework. Could you get some for me?
A: 2 What do you want ?
B: Please buy a ruler for me.
A: Sure 3 .
B: Yes. I’d like some pencils, too.
A: How many do you want?
B: 4 .
A: A ruler and four pencils. 5 .
B: Yes. Thanks.
A: You’re welcome.