17. W: Well, tonight we have Professors Brown in the studio to talk about his recent book-Fashion Images. Good evening, professor.
M: Good evening, and thank you for inviting me here this evening.

Q: What is the woman doing?

解析: B 。根据女士所说的“今天我们请布朗教授带着他的新书《时尚映象》来到我们演播厅”，可以看出她在主持节目。答案为B。

18. M: I'm looking for an apartment with a monthly rent to around 200 dollars in this neighborhood. Can you give me some advice on that?
W: Well, it's rather hard to find anything for less than 300 dollars here. Rents are lower in the suburbs, but you'll need transportation if you choose to live there.

Q: What do we learn from the conversation?

解析：D。男士问女士建议，女士说：“很难在附近找到房租低于300美元的房子”，言外之意是合乎男士要求的房子很难找。答案为D。