17.
M: Can I borrow your math textbook? I lost mine on the bus.
W: You've asked the right person. I happen to have an extra copy.
Q: What does the woman mean?
正確答案：B
解析：本題關鍵在于聽懂習慣表達“你問對人了（You've asked the right person）。”男士向女士借數學課本，女士說“你問對人了。我碰巧有一本多余的。”說明她可以幫助男士。A是對You've asked the right person的曲解。

18.
W: Hello, this is Dr. Gray's office. We're calling to remind you of your 4:15 appointment for your annual check-up tomorrow.
M: Oh, thanks. It's a good thing you've called. I thought it was 4:15 today.
Q: What do we learn from the conversation?
正確答案：A
解析：本題關鍵在于抓住時間的對比和口語表達“It's a good thing you've called. I thought... 幸虧你打來電話，我還以為……”體檢預約在第二天，但男士以為是當天，故答案為A（他差點弄錯了預約的日期）。