17.
W: I read an article about the auction websites. They seem quite good!
M: Well, these sites are set up to make money fast, and you never know what you're paying for. I won't take the chance. Why not go buy something at a discount from a real department store?
Q: What does the man think of auction websites?
正确答案：B
解析：女士说阅读了一篇关于拍卖网的文章，觉得拍卖网很不错。男士说拍卖网都是赚“快”钱的，你永远不知道你到底买了什么东西，自己不会去冒险，并建议女士去百货商店买降价货品。所以答案为B。前三个选项都带形容词结构，可猜测题目与某物的性质有关。即使没有听清楚男士长篇大论的意见，从最后一句“何不在百货商店降价的时候买东西”也可以推测出，男士对拍卖网没有持肯定的评价。

18.
W: John really gave me a big surprise yesterday.
M: I bet. He appeared at the wedding catching everybody's eye, because he was wearing jeans and everyone else was dressed so formally. Didn't he read the instruction on the invitation letter about the dressing code?
Q: What can we learn from the conversation?
正确答案：D
解析：根据对话，大家都穿着正式参加婚礼，但John却穿着牛仔裤，显得格外突兀。故答案是D。选项告诉我们，问题与John在婚宴上的穿着有关。既然有对话双方这样的讨论存在，就说明讨论的对象与众不同。强干扰项A利用女士的话做文章来进行夸大，但是从原文中并不能推导出A这样的结论。