根据情景,选择合适的选项完成对话。
A:What can I do for you, sir?
B:1___________________
A:We have a lot of fruits here.
B:How much is the banana?
A: 2_______________
B:That is good. The apples are red. 3____________
A:They are sixteen yuan.
B:I will buy them. 4_________________
A:Thank you. Bye.
B:5______________