15.
M: How are your piano lessons going?
W: Very well. My teacher thinks I'm making progress. And I find lessons well worth the time and trouble.
Q: What does the woman think of her piano lessons?
正确答案：D
解析：题目询问女士认为钢琴课怎么样。关键是要听到女士说“我觉得课程很值得费时费心”，D项与其同义，故为答案。

16.
M: Is that nice-looking straw hat light and strong?
W: Yes, you can wear it in rain or shine.
Q: What are they talking about?
正确答案：C
解析：选项是四个完全不同的事物，预测对话中会出现其中的几个单词，解题的关键在于听到中心词。本题的中心词是hat（帽子），wear（戴），故C才是他们谈论的事物。