A：I need some school things．
B：I'm sorry，I have to do my homework．Could you get some for me?
A： What do you want?
B：Please buy a ruler for me．
A：Sure．
B：Yes．I'd like some pencils，too．
A：How many do you want?
B：
A：A ruler and four pencils．
B：Yes．Thanks．
A：You're welcome．
A．Is that all?
B．Let's go to the shop，shall we?
C．Anything else?
D．No problem．
E．Can I help you?
F．Four, please．
