The experts were doing their experiment in the lab, ______ what happened outside.

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• 1The traffic rule says young children under the age of four and_____less than 40 pounds must be in achild safety seat.

  A.being weighed

  B.to weigh

  C.weighed

  D.weighing

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• 2 ______ that we can't get the necessary equipment , we will have to give up the experiment.   

  A.If

  B.Supposed

  C.Provide

  D.Assuming

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• 3— Come on, please give me some ideas about the project.   — Sorry. With so much work ______my mind, I almost break down.   

  A.filled

  B.filling

  C.to fill

  D.being filled

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• 4Last Saturday, a snowfall shut down airport runways across Europe, _____ numerous flights.

  A.causing

  B.to cause

  C.caused

  D.having caused

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• 5With trees and grass ______ 39.6% of the urban area,the city of Weifang has taken on a new look.   

  A.covered

  B.covering

  C.to be covered

  D.being covered

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• 6— We must start out early, _____ possible traffic delay. — Yes, we can easily _____ in it.

  A.allow for; get struck

  B.allowing for; get struck

  C.allow for; get stuck

  D.allowing for; get stuck

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• 7To get here in time, they came _________ all the way.  

  A.running

  B.run

  C.ran

  D.to run

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• 8Prices began to climb noticeably last year , _____a historical high in November.     

  A.hit

  B.to hit

  C.hitting

  D.being hit

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• 9With the guide ____ the way, we finally got to the village which we were looking for.

  A.led

  B.leading

  C.to lead

  D.had led

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• 10The retired man donated most of his savings to  the school damaged by the earthquake in Yushu, ____  the students to return to their classrooms.   

  A.enabling

  B.having enabled

  C.to enable

  D.to have enabled

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