听力原文:M: Have you noticed John's great progress he has made in his studies? He studies
W: Yeah, you can say that again. He is not what he used to be.
Q: What can we infer from the conversation?
(14)
A.John used to do quite well in his studies.
B.John is always good at studies.
C.John didn't like studies before.
D.John studies as hard as before.