PART C
Directions: You will hear three dialogues or monologues．Before listening to each one, you will have 5 seconds to read each of the questions which accompany it．While listening, answer each question by choosing A, B, C or D．After listening, you will have 10 seconds to check your answer to each question．You will hear each piece ONLY ONCE.
听力原文：M: Good morning, Miss．I'd like to speak to the manager.
W: I am the manager, Sir．How can I help you?
M: Oh, really? It's this radio．It doesn't work.
W: Mm..．did you buy it here?
M: What do you mean? Of course I bought it here．Look, you switch it on and nothing happens.
W: Could I see your receipt?
M: Receipt? I haven't got one.
W: Oh, you should have got a receipt when you bought it.
M: I perhaps did．I must have thrown it away.
W: Ah, well, have you got any other proof of purchase, the guarantee, for example?
M: No．It must have been in the box．I threw that away, too.
W: Oh, dear．You really ought to have kept it．We need to know the exact date of purchase.
M: What? I only bought it yesterday! That young man over there served me．Oh, I paid by cheque．I've got the cheque stub.
W: That's all right then．Did you check the radio before you left the shop?
M: Check it? No, it was in the box．I hoped it would work．It wasn't a cheap radio．It's a good make.
W: You should have checked it.
M: Come on! Do not tell me what I should have done, and do something! Either give me my money back or give me another raido.
W: There's no need to get aggressive, Sir．Let me look at it..．mm..．you see this little switch on the back?
M: Yes?
W: It's on 'main', and it should be on 'battery'．You really should have read the instructions.
M: Oh!
What kind of proof did the man probably have when he bought the radio?