17.
W: I have to think about your offer. I can't say "yes" or "no" at the moment.
M: You can take your time. It will do if you let me know your decision in a day or two.
Q: What does the man imply?
正确答案：D
解析：女士说自己现在无法给男士明确的答复，男士说：“不着急，一两天以后给我消息都可以。”take your time意为“不着急，慢慢来”。所以选D。如果听不懂习惯表达，可以利用后文的补充说明（你可以在1-2天内告诉我你的决定）来进一步理解。

18.
M: Can you look up the word for me?I never could get the alphabet straight.and it takes me hours to find the word I'm looking for.
W: Sure I'll be glad to. Let me see...
Q: What does the man want the woman to do for him?
正确答案：A
解析：男士说：“你能帮我查一个字吗？”接着解释他弄不明白字母表的查法，可见A正确。look up意为“查找”，只要听明白该短语便可直接定位到选项A，find为look up的同义转换。