用适当的词填空，使对话完整正确。

A: Good morning.Can I help you?

B: Yes,please,I'd like to buy a mobile phone,but I don't know much about mobile phones.

A: Well,what brand do you like,Motorola,Nokia orSiemens?

B: I have no idea.Which brand is sold _1   of all?

A: Motorola and Nokia are more popular. You can buy a Nokia if you like.

B: How much is a Nokia?

A: It depends on   2   types you buy.The old type is cheaper and the new type is expensive.

B: I don't want the newest.A practical one will do.

A: You can have this one.It looks nice and works   3   and it's not expensive.

B: How much is it?

A: 1,200 yuan.

B: Does it include everything?

A: No.If you choose a number,you need to    4     another 200 yuan.

B: OK. I'll take this one.Thank you for your help.

A: It's my    5  .