听力原文：Federal Express is a private airline service which expands the Postal Service in

听力原文： 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 failure. In the space of one hour, 39 jets will take off to destinations all across the United States.

(33)

A．Its specialization in transporting small packages.

B．The low cost of its service.

C．Being the first airline to send urgent letters.

D．Its modern sorting facilities.