听力原文:M: Bob is surely so swift in class.W: You bet. The professor never catches him of
听力原文:M: Bob is surely so swift in class.
W: You bet. The professor never catches him off guard.
W: What do we learn from the conversation?
(16)
A.Bob is very good at running,
B.Bob works as a guard.
C.Bob never skips the professor's class.
D.Bob is very smart.