165.
W: This is a great jacket, but look at the price! HK $600! It's too expensive!
M: No, wait, it's pretty reasonalbe. You're thinking in Hong Kong dollars, not US dollars. It's only about 100 US dollars.
W: You're right.
答案解析：
正确答案为C。根据look at the price! HK $600!看看价格，600港币。可知，C项正确。

166.
W: How many students took the IELTS test last month?
M: Well, let me see. Xixty had registered, but not everyone turned up. I believe we had 23 from Korea and 19 from Japan.
答案解析：
正确答案为C。根据we had 23 from Korea and 19 from Japan.23名韩国学生，19名日本学生参加雅思考试，可知共42名学生参加了雅思考试，因此C项正确。