录音原文：
15.
W: Mark is playing computer games.
M: Should he do that when the final exam is drawing near?

16.
W: But what happens if it rains? What are we going to do then?
M: We'll have to count on good weather, but if it does rain, the whole thing will have to be canceled?

解析：

15. B 关键在于听懂the more... the less这个比较句型。“教授讲的越多，我懂的越少”——说明男士听不懂教授的课，故选B。A,C均为无关原词的胡乱拼凑，D为无关信息。

16. C 关键要明白男士用的反问句型Should he do that所表达的否定意为和when the final exam is drawing near所表达的背景——“期末考试马上就到了，他还应该玩游戏吗？”言外之意即男士认为Mark应该“复习功课”，而不是“继续玩游戏”。据此，排除A和C。