听力原文:W: Professor, a few of us at the hack didn't get your copy of reading assignment. M: Well, there're only 38 names on my clam list. And I didn't bring any spare copies. Q: What do we learn from the conversation? (19)
A.
Some students at the back cannot hear the professor.
B.
The professor has changed his reading assignment.
C.
Some of the students are not on the professor's list.
D.
The professor has brought extra copies of his assignment.