Email,as well as telephones,________an important part in daily communication.

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• 1一Ready to give up guessing，Sandy? 一No，no，hold on! I think I______ at the answer now．

  A.arrive

  B.am arriving

  C.have arrived

  D.will arrive

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• 2—Ready to quit guessing, Sandy?—No, no, I hold on! I think I        to the answer.

  A.come

  B.have come

  C.came

  D.am coming

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• 3With the death of Libyan leader Muammar Gadhafi on Thursday, the country's new leaders ______ the challenge of rebuilding a war-torn nation.  

  A.faced

  B.are facing

  C.had faced

  D.is faced

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• 4With more forests being destroyed, huge quantities of good earth ______ each year.

  A.is washing away

  B.is being washed away

  C.are washing away

  D.are being washed away

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• 5Teenagers _____ their health because they play computer games too much.

  A.have damaged

  B.are damaging

  C.damaged

  D.will damage

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• 6—  Ready to quit guessing, Sandy?— No, no, I hold on! I think I______ to the answer.

  A.come

  B.have come

  C.am coming

  D.came

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• 7Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.

  A.work

  B.have worked

  C.is working

  D.are working

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• 8Remember to save what you ________ on once in a while in case the computer suddenly crashes.

  A.work

  B.will work

  C.are working

  D.worked

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• 9Hurry! The train ________. You know it ________ at 8: 00

  A.m.. A.leaves; leaves

  B.leaves; is leaving

  C.is leaving; leaves

  D.is leaving; leaving

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• 10—Have you decided when to leave for Beijing?—Yes, I ______ the day after tomorrow.

  A.am leave

  B.have left

  C.left

  D.am leaving

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