What is new, however, is the scientific attempt ________ whether other planets beyond our own have given birth to advanced civilizations．

试卷相关题目

• 1I decided to quit the job, because I felt my boss hard _________．

  A.to be satisfied

  B.to satisfy

  C.satisfied

  D.being satisfied

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• 2Just as the value of a telephone network increases with each new phone ________ to the system, so does the value of a computer system increase with each program that turns out．

  A.adding

  B.to have added

  C.to add

  D.added

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• 3Schools across China are expected to hire 50,000 college graduates this year as short-term teachers ________ increase job opportunities．

  A.help

  B.to have helped

  C.to help

  D.having helped

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• 4Astronauts can be affected by loneliness for they have to sit in the spacecraft for weeks with very little ________ and no one ________．

  A.to do; to talk

  B.doing; to talk to

  C.to do; to talk to

  D.doing; to talk

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• 5We ran there as quickly as we could, ________ the plane had taken off．

  A.found

  B.finding

  C.only to find

  D.only finding

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• 6Mr．Caraway is said ________．Who do you know has succeeded him?

  A.to have retired

  B.to be retiring

  C.to retire

  D.having retired

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• 7We should insist on ourselves ________ enough exercise to keep healthy．

  A.to take

  B.take

  C.taking

  D.should take

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• 8Corn is delicious ________ with butter in the eyes of westerners．

  A.when eaten

  B.when to eat

  C.when to be eaten

  D.when eating

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• 9________, the three countries found themselves ________ peacefully instead of by war．

  A.Much to their surprise; united

  B.To their great surprises; united

  C.Much to their surprise; uniting

  D.To their great surprise; uniting

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• 10We should try to find ways to help beginners ________ the basic skills ________ to learn a new language．

  A.request; required

  B.require; acquired

  C.gain; requested

  D.acquire; required

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