Read the article below and then choose the best answer to complete each sentence. Đọc bài văn dưới và chọn đáp án thích hợp cho mỗi câu.

In an effort to attract more passengers, airlines are now providing frequent travelers with services that rival those of first-rate restaurants and hotels. The routine privileges most companies offer first-class and business clientele include express check-in, free drinks and headsets, and more refined menus. In addition, a growing number of airlines have amenities such as fully reclining sleeper seats and furnish eyeshades and slipper socks. At some international airports companies have established membership lounges that allow business travelers the use of facsimile machines, personal computers, and private conference rooms. A few have even gone so far as to install video systems on the arm rests of seats and to serve meals upon request rather than on a fixed schedule. All of these services come at a price, however, that is reflected in ticket prices substantially above those for regular coach class.