Under what conditions are helicopters found to be absolutely essential、

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• 1How has the use of helicopters developed、

  A.They have been widely used for various purposes.

  B.They are taking the place of high-flying jets.

  C.They are used for rescue work.

  D.They are now used exclusively for commercial projects.

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• 2What is said about the development of the helicopter、

  A.Helicopters have only been worked on by man since 1940.

  B.Chinese children were the first to achieve flight in helicopters.

  C.Helicopters were considered more dangerous than the early airplanes.

  D.Some people thought they would become widely used by average individuals.

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• 3Helicopters work with the aid of ________.

  A.a combination of rotating devices in front and on top

  B.a rotating device topside

  C.one rotating fan in the center of the aircraft and others at each end

  D.a rotating fan underneath for lifting

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• 4People expect that ________.

  A.the airliners of today would eventually be replaced by helicopters

  B.helicopters would someday be able to transport large number of people from place to place as airliners are now doing

  C.the imaginations fired by the Russian engineer’s invention would become a reality in the future

  D.their fantastic expectations about helicopters could be fulfilled by airliners of today

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• 5Being in no great hurry, ________.

  A.we went the long route with scenery

  B.the long, scenic route was our preference

  C.we took the long scenic route

  D.our preference was taking the long, scenic route

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• 6In ancient Greece, the Olympic Games ________.

  A.were merely national athletic festivals

  B.were in the nature of a national event with a strong religious colour

  C.had rules which put foreign participants in a disadvantageous position

  D.were primarily national events with few foreign participants

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• 7In the early days of ancient Olympic Games ________.

  A.only male Greek athletes were allowed to participate in the games

  B.all Greeks, irrespective of sex, religion or social status, were allowed to take part

  C.all Greeks, with the exception of women, were allowed to compete in Games

  D.all male Greeks were qualified to compete in the Games

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• 8The order of athletic events at the ancient Olympics ________.

  A.has not definitely been established

  B.varied according to the number of foreign competitors

  C.was decided by Zeus, in whose honor the Games were held

  D.was considered unimportant

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• 9Modern athletes’ results cannot be compared with those of ancient runners because ________.

  A.the Greeks had no means of recording the results

  B.they are much better

  C.details such as the time were not recorded in the past

  D.they are much worse

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• 10Nowadays, the athletes’ expenses are paid for ________.

  A.out of the prize money of the winners

  B.out of the funds raised by the competing nations

  C.by the athletes themselves

  D.by contributions

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