---- Flight 551 for Dallas . I must be off now. ------Have a pleasant trip then.A．is being announcedB．has announcedC．was announcingD．had been announced 题目和参考答案——青夏教育精英家教网—

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---- Flight 551 for Dallas ________. I must be off now.
------Have a pleasant trip then.

A．is being announced

B．has announced

C．was announcing

D．had been announced

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　　Flight attendants are part of those working on aeroplane passenger flights. They serve as a connection between the airline and its passengers. They satisfy the personal needs and comforts of the passengers while carrying out normal duties. They try to make the passengers' trip so enjoyable that they will want to fly with the airline again. Attendants receive training that helps them work calmly in an emergency and ensure(保证) the safety of the passengers.

　　The first flight attendants of US airlines were men. But from the 1930's until the 1970's, the airlines hired only women as attendants Though men have now returned to the position, the majority of flight attendants are women.

　　Long-distance flights have as marry as 14 attendants on the largest jets(喷气式飞机) and 6 on other planes. Most short-run jet flights have at least 3 attendants.

　　Fligh attendants check on flight conditions, food, and emergency equipment. They give safety instructions to the passengers, make flight announcements before and after take-off, and try to make the passengers as comfortable as possible.

　　Flight attendants are trained at special schools. The course lasts from three to seven weeks. The training includes wide classroom work and practical in-flight experience in a model cabin(机舱).

　　The airline pays flight attendants' expenses while they are away from their basic station.

1．The underlined word“emergency”in the first paragraph should mean ________.

[　　]

A．any kind of difficulty

B．misunderstanding from passengers

C．something that happens strangely

D．something that happens suddenly

2．Which of the following are flight attendants' duties while they are on flights?

a．Checking on emergency equipment

b．Giving safety instructions.

c．Preparing food for passengers

d．Receiving expenses from the airline