听力原文:W: John, are you doing research for Professor Williams this semester?M: Actually,
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)
A.He needs another job as research assistant.
B.He asked Professor Williams for assistance.
C.He assists Professor Williams with his teaching.
D.He is doing research with Professor Williams.