A: Can I help you?
B: Yes. how much are the carrots?
A: They are one dollar a kilo.
B: Oh, it's a little bit expensive. Ok. I'd like half a kilo, please. 
A: What else do you want?
B: I want some bananas .
A: Green bananas or yellow bananas?
B: I want green bananas.
A: How many do you want? 
B: I want five.
A: OK. Anything else?
B: Are these oranges?
A: No, They are lemons. 
B: I don't like lemons.