A、Over $20 B、Over $200. C、Over $30. D、Over $300. B本题的问题关键词是price。注意问题问的是original price原始价格，对话中提到原始价格是over $200，因此选B。

W: Hey, you’re in my English class!
M: Yes, I am.
W: Did you buy the textbook yet?
M: No, it’s really expensive.
W: How much is it?
M: The original price is over $200.
W: We could buy it from a former student.
M: We could also buy the used version.
W: That is a great idea!
M: I will give you the website to buy used books.
W: Thank you so much.
M: No problem at all.
6. What’s the original price of the textbook?
7. Where could they buy the used version of the textbook?