听力原文：Man: Hello. This is Guy Cooper from Centron Electronics here. I believe you rang for some advice about your alarm system, which isn't functioning properly. The message I got said you weren't sure if you needed someone to come and sort it out, or if we could advise you over the phone. Well perhaps you'd like to get back to me as soon as it's convenient and tell me exactly what the problem is, and I'll see what I can do. You will hear another five recordings. For each recording, decide what the speaker's purpose is. Write one letter ( A--H )next to the number of the recording. Do not use any letter more than once. After you have listened once, replay the recordings. t