The skin is the largest organ of your body ______of three layers; ______are essential to ____your body  against diseases, poisons and the sun's harmful rays or radiations.      

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• 1This means that an object ______ 120 kilograms on the earth will only weigh 20 kilograms on the moon.

  A.weighed

  B.being weighed

  C.weighs

  D.weighing

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• 2When________there, the postman found the door locked and then stopped ______the letter under it.

  A.reaching; to stick

  B.reached; to stick

  C.reaching; sticking

  D.reached; sticking

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• 3When I got back home I saw a message pinned to the door____''Sorry to miss you; will call later.''    

  A.read

  B.reads

  C.to read

  D.reading

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• 4Everywhere we saw people ________ the victory at that time.

  A.celebrating

  B.celebrated

  C.being celebrated

  D.to celebrate

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• 5He is a hesitating man. And he is always _________everything.   

  A.deciding over

  B.decided over

  C.hesitating over

  D.hesitated over

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• 6____________ from what he said, I'd say he would be in the race.

  A.Judged

  B.To judge

  C.Judging

  D.To be judged

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• 7Peter received a letter just _________ his grandma would come to see him soon.

  A.said

  B.says

  C.saying

  D.to say

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• 8It rained heavily in the south,_____ serious flooding in several provinces.

  A.caused

  B.having caused

  C.causing

  D.to cause

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• 9He got up late and hurried to his office, _________the breakfast untouched.

  A.left

  B.to leave

  C.leaving

  D.having left

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• 10In April, 2009, President Hu inspected the warships in Qingdao, _____ the 60th anniversary of the founding of the PLA Navy.      

  A.marking

  B.marked

  C.having marked

  D.being marked

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