听力原文:M: Miss Jason, thank you for sending me this note. I'm sorry to hear Bill is bein
W: I'm not sure what's happening to Bill. He's usually a good student. He completes all his work and he's quiet in class. Then, last month, he just changed.
Q: What can you infer from the conversation?
(14)
A.The woman is the man's boss.
B.The man is the woman's husband.
C.The woman is the headmaster of a school.
D.The woman wants to know something about a student.