Before the first nonstop flight made in 1949,it______necessary for all planes to land for refueling.

试卷相关题目

• 1We first met on a train in 2000. We both felt immediately that we                   each other for years.

  A.knew

  B.have known

  C.had known

  D.hope

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• 2Although it _________ in the desert most of the year, people still live there.

  A.doesn't rain

  B.didn't rain

  C.hasn't rained

  D.hadn't rained

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• 3After a fire broke out in the workshop, a lot of equipment ____

  A.is damaged

  B.had damaged

  C.was damaged

  D.damaged

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• 4The hotel wasn't particularly good. But I______in many worse hotels.

  A.was staying

  C.stayed

  D.would stay

  E.had stayed

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• 5He______on the farm for twenty years and now he is a teacher.

  A.has worked

  B.had worked

  C.worked

  D.works

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• 6Chinese Premier Wen Jiabao _______an important speech on April 30,2011 in Indonesia, __________he is currently on an official visit .

  A.is delivering ; that

  B.was delivered ; in which

  C.delivered ; where

  D.had delivered ; when

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• 7The days we have been looking forward to ____ soon．

  A.coming

  B.will come

  C.came

  D.have come

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