Ok.Here you are.Is that
补全对话：
A:Good morining!Can I help you?
B:I'd like some bananas,please.
A:_1_ _2_do you want?
B:Two kilos,please.
A:OK.Here you are.Is that _3_?
B:No.Do you have any oranges here?
A:Yes.
B:How much are there things?
A:Twenty yuan,please.
…………
请问1、2、3各应填什么?