Be careful when you open an unknown document. It might contain the deadly virus which could entirely ______ your computer system in a minute.    

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• 1The early settlers in the jungle didn't have such advanced equipment _____ we have today to fightagainst natural disasters and many a time they _____ despair(绝望) but they survived somehow.

  A.that; got close to

  B.as; got near to

  C.that; were close to

  D.as; got close to

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• 2An appropriate amount of temporary pressure can ______ a kind of motivation to do something well, but once it becomes constant or permanent, psychological problems are likely to _______.      

  A.act as; rise

  B.play as; appear

  C.work as; raise

  D.serve as; arise

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• 3There is no point arguing about what _____ the accident. The point is what to do with the victims of it.

  A.led to

  B.caused to

  C.accounted to

  D.resulted from

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• 4The star performer of comic dialogue is full of humor, who is able to ______an occasion whenever_____ go wrong with his humorous performances       

  A.light up; things

  B.brighten up; things

  C.amuse; the things

  D.entertain; things

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• 5The new examination system has to be _______ in special regions before it can be applied nationwide.     

  A.put out

  B.experimented out

  C.tried out

  D.taken out

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• 6No sooner had I began to sing the English song than it was_______ by a 13-year-old girl. She sang the song so beautifully that I couldn't help asking her when she had ______ the study of English.      

  A.brought up; taken up

  B.picked up; picked up

  C.taken up; taken up

  D.come up; set up

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• 7Though difficult, I ________ him find a job, which made him very pleased.      

  A.tried to help

  B.managed to help

  C.tried helping

  D.succeeded to help

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• 8No matter how clever a computer becomes, it can never _____ of humans, because it has to with artificial intelligence, which is made by us humans.

  A.take place

  B.instead of

  C.take the place

  D.substitute

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• 9Since there was no way out, the robber decided to _______on his luck to see if he could run away.    

  A.make a chance

  B.take chance

  C.take a chance

  D.try a chance

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• 10_______  cars when you cross the busy street. Which of the following is not OK?    

  A.Watch out for

  B.Look out for

  C.Watch over

  D.Be careful of

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