（）What can you predict when you hear the professor asking about the student’s observing a class for his approaches to education paper
A. They will probably talk about his understanding of effective teaching skills
B. They will probably talk about how to improve his study habits
C. They will probably talk about his language learning strategies
D. They will probably talk about his student loans
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Which of the following expressions don’t mean “延误会有多久”（）
A. What’s the extent of the delay
B. How often is the delay last
C. When’s the delay
D. How long will the delay be
The airline company will compensate for the delay if it is caused by_（）
A. mechanic trouble
B. bad weather
C. air traffic congestion
D. security check
What do “Irregular flights” refer to（）
A. delayed flights
B. cancelled flights
C. Both A and B
D. none of the above
Passengers can’t get the information of flight delay from_（）
A. the ticket office
B. flight crew
C. check-in counter
D. the airport announcement
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