Questions 17 to 20 are based on the passage you have just heard.

　　17. What is the total number of students at Deep Springs College?

　　18. What is true of the campus of Deep Springs College?

　　19. Which of the following is mentioned in the passage?

　　20. What can students at Deep Springs do in their spare time?

　　注：選項短，細節(jié)題，邊聽邊看選項。

　　Federal Express is a private airline service which expands the Postal Service in the United States. It is the only U. S. airline specializing in the transportation of small packages-35 kilos or less.

　　Federal Express links 130 major U.S. cities and 10,000 surrounding communities. An ur­gent package picked up in one part of the country this afternoon can be delivered to any other part of the country tomorrow morning. All of the Federal Express jets fly into the International Air­port at Memphis, Tennessee, because it is located in the center of the United States.

　　The sorting facility for Federal Express is called "The Hub". Every night, from about 12 midnight to 3 a. m. , the packages are gathered and sorted into shipments for specific destina­tions. The main labor force is comprised of students working part-time.

　　Since Federal Express started business in 1971, it has flown millions of air kilometers with­out fail. In the space of one hour, 39 jets will take off to destinations all across the United States.

　　Questions 17 to 20 are based on the passage yon have just heard.

　　17. What makes the Federal Express so unique in the U.S. airline service business?

　　18. How many major U.S. cities does Federal Express link?

　　19. Why do all of the Federal Express jets fly into the International Airport at Memphis, Ten­nessee?

　　20. Who comprises the main labour force of Federal Express?

　　注：1. Federal Express 聯(lián)邦快遞

　　2. ur­gent package 快件