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.