___ countless failures, the scientist finally succeeded in discovering the chemical substance.

试卷相关题目

• 1—What are you doing there?   —I am tasting the soup. It ______ wonderful.   

  A.tastes

  B.tasted

  C.is tasting

  D.is tasted

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• 2_____ different kinds of pianos, the factory is sure they can satisfy people's needs.

  A.To produce

  B.Being produced

  C.Produced

  D.Having produced

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• 3Her pale face suggests that she ______ in poor health and strongly suggest that she _____ a doctor.      

  A.is; sees

  B.be; see

  C.is; see

  D.be; should see

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• 4____ enough money, Jim was unable to buy his girlfriend expensive jewellery.

  A.Not to save

  B.Not saving

  C.Not saved

  D.Not having saved

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• 5____to reach them on the phone, we sent an e-mail instead.

  A.Fail

  B.Failed

  C.To fail

  D.Having failed

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• 6______ a little money, Jane was able to buy her mother a lovely new watch.

  A.To save

  B.Saving

  C.Saved

  D.Having saved

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• 7The old man, ____________ abroad for twenty years,is on the way back to his motherland .

  A.towork

  B.working

  C.tohaveworked

  D.havingworked

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• 8___ his work, he started to play the computer games.   

  A.Being finished

  B.Having finished

  C.Finishing

  D.Having been finished

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• 9The little boy stood before the shop window,______ his eyes on the toy bear in it.    

  A.havingkept

  B.kept

  C.beingkept

  D.keeping

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• 10After the flood, no house in the village _________. People _________ homeless.     

  A.left standing, remain

  B.remained standing, were left

  C.was remained standing, were left

  D.was left to stand, remain

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