【单选题】听力原文:W: John, are you doing research for Professor Williams this semester? M: Actually, I'm working as his teaching assistant. Q: What does the man mean? (18)
【单选题】听力原文:W: John, are you doing research for Professor Williams this semester? M: Actually, I am working as his teaching assistant. W: You are lucky. It's a position where you can learn much from the prof...