___, founded in 1988，is China’s only national flag carrier（）
A. China Southern Airlines
B. Hainan Airlines
C. Air China
D. China Eastern Airlines
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Which is not included in the service provided to the passengers in the business class（）
A. Boarding through VIP-only access
B. Comfortable seats with more space between them
C. Entertainment facilities
D. More delicious food
What is the main difference between first class and economy class（）
A. Facilities
B. Cabin attendants
C. Food
D. Cost
Who are not in charge of the maintenance of the aircraft（）
A. Pilots
B. Avionic engineer
C. Mechanics
D. Maintenance technicians
What’s the professor’s attitude towards writing things down（）
A. It is more useful than a voice recorder
B. It’s less useful than a voice recorder
C. It cannot give you a chance for clarification
D. It’s too complicated and difficult to take notes
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