17.
M: Er... Hi! Could you tell me where electronic products are displayed? I want to see some TVs, digital video cameras, DVD players-that sort of thing.
W: Well, several countries are displaying electronic products. China's selection is very large this year. You might as well go to the East wing first to take a look at the Chinese booth.
Q: Where is this conversation most probably taking place?
正確答案：C
解析：根據several countries和display可以得出發生地點應在international trade fair（國際貿易展覽會）。

18.
M: Well, what did you think of the movie?
W: I don't know why I let you talk me into going. I just don't like violence! Next time you'd better choose a comedy.
Q: What can we infer from the conversation?
正確答案：D
解析：根據女士所說“我不知道為什么聽你的話去看那部電影”，可以得出結論她不喜歡看那部電影，所以選D“后悔去看了”。