从方框里选择适当的句子完成对话，其中有两项是多余的。
A: Good morning, madam . What can I do for you?
B:  But it doesn't work. Can I return it for a refund(退款)?
A: Let me have a look at the radio. Oh, there is really something wrong with it.
B: That's a good idea. 
A: How about this one? It's made in Japan, but it's five dollars more expensive than that one.
B: I see. 
A: One year. 
B:
A: Sure.
B: Well, it's very nice, and I'll take it. Here is the money.

A．I’d like to buy a radio.

B．Could I try it out?

C．How long is the warranty period(保修期) of the radio?

D．May I change them?

E. I bought this radio here yesterday morning.
F. Please show me some others.
G. But I think you’d better change it for another one .