单项选择题
[听力原文] W: I would like everyone to hand in his term paper this lesson tomorrow. M: Are you going to grade it
A.Customer and salesman. B.Wife and husband. C.Doctor and patient. D.Teacher and student.
A.Because he hasn’t a phone. B.Because he’s leaving the city right now. C.Because he’s calling from a friend’s. D.Because his wife is terribly sick.