听力填空: A: Hi, Mary! I know you are good at computer. Could you help me with my computer? B: Of course. What’s 1 with your computer? A: My father has bought me a new 2 . But it can’t work! I don’t know why. B: Don’t worry. Let me 3 it. Oh, it certainly can’t work. You only have the computer hardware system. A: What’s your meaning? B: I mean if your computer can work, it not only needs the computer hardware system, but also needs the computer 4 . A: Oh, I see. B: Did you never know it? A: You know I’ m a computer 5 .