"The price of books for our students is just getting higher and higher, and along with the rising cost of tuition（学费）, it's killing these students," said Peter Jason, a college professor. "Remember, students are one of the poorest groups of people in America. Almost half of them have at least one part-time job. In fact, one of my students has three jobs. And she still manages to have high scores and go to school full-time."
Textbook prices are usually high. Adding to that problem, many college teachers change textbooks year after year. They either upgrade to a new edition（版本）or change to a different textbook. This further hurts students because if a teacher no longer uses a textbook, that book has no resale value.
Dr. Jason decided to make life a little easier and a lot cheaper for his students by writing his own book on public speaking. "Many books have an increased price because of CD-ROMs, lots of color photographs and pictures. I talked to my students, and many of them, like me, prefer to keep things simple. So, a few years ago, I wrote my own textbook. I made sure that it was simple. Compared to most of other public speaking books, mine is half the number of pages, and one-third the price. That is $30 instead of $90. When I wrote a second edition last year, students only had to buy the 35 new pages. For only $7, they had almost a new book. "
The underlined phrase "that problem" in Paragraph 2 refer to ____.（ ）
- A.the high prices of textbooks
- B.the high resale value of books
- C.too many editions of new books
- D.no color pictures in textbooks
正确答案及解析
正确答案
解析
第二段第一句可知，课本费很高。针对这一个问题，老师们每年更换课本，故我们可推出这个问题即指代上文书本费越来越高，故选A。
