15.(A). Professor Graff doesn’t usually write on the blackboard.

　　(B). Students are rarely bored in Professor Graff’s class.

　　(C). The professor uses graphs when she lectures.

　　(D). Students in the graphic arts course don’t take notes.

　　16.(A). A couple of people left during the discussion.

　　(B). One person spoke and the others listened.

　　(C). All but a few people shared their ideas.

　　(D). Not everyone fully participated in the discussion.

　　答案与音频文本：

　　A D

　　15. Professor Graff seldom uses the blackboard during her lectures.

　　16. The discussion was dominated by a couple of people.