Test 1

[2020·ºÓÄÏ¡¢¹ã¶«¡¢ºþ±±¡¢ºþÄϲ¿·ÖѧУ3ÔÂÁª¿¼]   A textbook exchange is a business that buys and sells college textbooks. Textbooks can represent 1.________ significant part of a student's education budget. By purchasing used textbooks or selling unneeded books to a textbook exchange, students can   2.________  (great) reduce their expenses.

Traditionally, university bookstores were the only sources for   3.________ (require) textbooks. The success of bookstores   4.________ buy and sell used books inspired some businesses  5.________   (copy) the process for textbooks. A textbook exchange will purchase textbooks from students who have completed courses and no longer need the materials. This means the business can resell the used books at a price much lower than their original cost. This is very    6.________    (benefit) to students who are struggling to meet their school fees and living expenses.

Ever since it first appeared, the textbook exchange  7.________ (increase) the options for students. Now used textbooks   8.________ (deliver) almost anywhere through any standard delivery service. This means students are not limited  9.________  the books available at their local university bookstores. They can compare   10.________  (price) on a national or even international level and choose the most reasonably priced editions. This changes the supply­and­demand economic factors that create high prices for most textbooks.