15.
M: The seminar scheduled for today has been canceled.
W: That's too bad. But at least the one for next week is still on.
Q: What does the woman mean?
正确答案：B
解析：本题是中间带but的转折题，but后面是答案。B表达的正是But后句子的含义，故为答案。the one指代seminar，on意为“召开”。

16.
M: Do you really have to go down to the river to wash your clothes?
W: Yes, but all this considered, life in the country is still a lot less complicated than life in the city.
Q: How does the woman think about life in the country?
正确答案：C
解析：比较句型要反应快，本题关键在于听清less complicated，即simple，故选C。