17.
W: Mr. Watson, I wonder whether it's possible for me to take a vacation early next month.
M: Did you fill out a request form?
Q: What is the probable relationship between the two speakers?
正确答案：C
解析：关键是要听到女士说要“休假”，而男士要求她“填写申请表”，可以断定是上下级关系，故答案为C。

18.
M: Do you want to go to the lecture this weekend? I hear that the guy who is going to deliver the lecture spent a year living in the rainforest.
W: Great! I am doing a report on the rainforest. Maybe I can get some new information to add to it.
Q: What does the woman mean?
正确答案：B
解析：本题关键在于听懂女士所说的“没准我可以获得一些新信息来加到我的报告中去。”也就是说她认为这个讲座富含信息，故答案为B。选项A、D是利用原文中个别单词制造的干扰项；C错在her lecture，讲座是the guy而不是她做的。