This computer doesn't work properly, because a certain virus has ____________ the operating system.

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• 1There will be a discussion tomorrow；all those who want to ________，please raise your hands.

  A.join

  B.take part

  C.take a part

  D.take part in

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• 2I'll be late and mother will be angry with me，but I don't________it.

  A.care for

  B.care about

  C.take care

  D.take care of

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• 3There are some differences between American English and British English. Do you know how these differences ________ .

  A.come about

  B.came about

  C.were happened

  D.were taken place

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• 4Einstein liked Bose's paper so much that he ________ his own work and translated it into German.              

  A.gave off

  B.turned down

  C.took over

  D.set aside

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• 5Mary often does some translation work to earn extra money, which ________ half of her income.

  A.makesup

  B.countson

  C.accountsfor

  D.consistsin

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• 6The employee ____________ to impress the company with his cleverness and promptness.

  A.setabout

  B.setout

  C.setoff

  D.setup

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• 7The meeting was________ when the speaker became ill.

  A.cut in

  B.cut short

  C.cut out

  D.cut up

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• 8The company is prepared to upgrade the package of its products to _________ teenage buyers.

  A.apply to

  B.appeal to

  C.add to

  D.react to

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• 9If he can ____________ a little longer,we can get help for him.

  A.holdup

  B.holdon

  C.keepup

  D.keepon

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• 10How the big forest fire has _____ remains to be a mystery.   

  A.taken place

  B.turned up

  C.broken out

  D.broken up

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