17.
W: We've lived here in Hoe Farm for 5 years now and I think it's time to have the house painted.
M: You're right. Mr. Churchill, our neighbor, just had his house painted. But we cannot afford the fee unless we do it ourselves.
Q: What do we learn about the speakers?
正确答案：D
解析：关键是听到But后面的“我们请不起人来粉刷屋子，除非自己动手”，cannot afford对应lack of money，故答案为D。Mr. Churchill是他们的邻居，刚刚请人刷了自己的房子，但并没有提及Mr. Churchill会帮他们刷房子，故不选A；B与原文相反；他们负担不起请人来刷房子的服务费，C却说先问价钱再请人，故不正确。

18.
W: I still can't get over the show last Saturday evening. I keep having nightmares all night.
M: So, next time before you walk into a theatre, make sure what you are going to see. I don't want to hear your complaints again and it is kind of wasting money too.
Q: What do we learn from this conversation?
正确答案：B
解析：关键是抓听到女士所说的“看过的电影老在脑中出现，整晚都做噩梦”，据此可推知她看了一部恐怖片，故选B。