【单选题】听力原文: If you don't use your antis or your legs for some time, they become weak, when you use them again, they slowly become strong again. Everybody knows that. Yet many people do not seem to know that...
【单选题】听力原文:M: I have trouble concentrating when my roommate plays the guitar. W: Why don't you just ask him to turn down the volume, Peter7 Q: What does the woman suggest Peter do? (18)