Without the earth's atmosphere to protect them, astronauts can be exposed to intense radiation from the sun, ________ them at risk of cancer.

试卷相关题目

• 1____ by high mountains, the city is infamous for air pollution.

  A.Surrounding

  B.To be surrounded

  C.Surrounded

  D.Having surrounded

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• 2His spare time is made full use_______ law.

  A.to study

  B.study

  C.of studying

  D.of to study

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• 3A person , when_________，can often do what is normally beyond his ability.

  A.challenged

  B.challenges

  C.challenging

  D.to challenge

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• 4Tom took a taxi to the airport, only _______ his plane high up in the sky.

  A.finding

  B.to find

  C.being found

  D.to have found

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• 5He went out to play football, leaving his homework _________.

  A.to unfinish

  B.to be unfinished

  C.unfinishing

  D.unfinished

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• 6---Did the book give the information you need? --- Yes. But _____ it, I had to read the entire book.

  A.to find

  B.find

  C.to be finding

  D.Finding

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• 7Every minute is made full use of _________ our lessons before the exam.

  A.studying

  B.studied

  C.to study

  D.being studied

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• 8_______ an important decision more on emotion（情感）than on reason, you will regret it sooner or later.

  A.Basing

  B.Based

  C.To base

  D.Base

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• 9_________the answer, the boy, who asked the question, still stood with his hand ______.

  A.Giving, raised

  B.Giving; rising

  C.Given; risen

  D.Given; raised

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• 10Jr．Parkinson stood up and left the room, ________ the door behind him．

  A.closing

  B.closed

  C.close

  D.to close

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