15.
M: Hi, Janet. I hear you've just returned from a tour of Australia. Did you get a chance to visit the Sydney Opera House?
W: Of course I did. It would be a shame for anyone visiting Australia not to see this unique creation in architecture. Its magnificent beauty is simply beyond description.
Q: What do we learn from the conversation?
正确答案：C
解析：本对话的话题是Sydney Opera House, unique creation in architecture“建筑学上独特的创作”和magnificent beauty beyond description“难以描述的美”，这些用词充分表达了女士对悉尼歌剧院的赞美。对话主题不是泛泛而谈landscape或architecture，故A、B错；Janet说visiting Australia的游客不参观Sydney Opera House很遗憾，而不是D“不到澳大利亚很遗憾”。

16.
M: Sherry, how are you doing with your thesis?
W: Oh, my thesis! That's something I definitely don't want to talk about right now. I finished my first draft some time ago, but my supervisor said I should do more research if I want to achieve the quality he expects of me.
Q: What do we learn from the conversation about the woman's thesis?
正确答案：D
解析：女士不想谈她的thesis，说明有问题，故可排除A和B；对话中只提到她的supervisor，没有提到很多人，故C错；假设条件句“If I want to achieve the quality he expects of me”说明现在还没achieve the quality he expects of me，即D“她的论文没有达到导师的期望值”。