【单选题】听力原文:W:You are so concentrated on your book that you even can't hear me come into your room. M:Are you talking to me? The music in my earphone is so loud. Q:What can be inferred from this conversation...
【简答题】Where does your food come from? How is it made? These days, many people worry about food safety. But food safety is not a new worry. In 1906, Upton Sinclair wrote the Jungle. The book is the story of ...