There are over 58,000 rocky objects in ________ space，about 900 of which could fall down onto ______ earth．

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• 1The police are in _____ search of the missing boy, who may be in _____ great danger.

  A.the; the

  B.不填; 不填

  C.the; 不填

  D.不填; the

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• 2It was ______ exciting news that more than ten students in a single school were admitted to Tsinghua University in the same year.

  A.one

  B.an

  C./

  D.a

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• 3The campers began to make________fire from the dry branches to cook their lunch,which made their tent catch________fire.

  A.a; a

  B./; a

  C.a; the

  D.a; /

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• 4After watching _____ TV, she listened to _____ radio.

  A./; /

  B.a; the

  C.the; the

  D./; the

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• 5I smoke out of ____ habit, not for ____ pleasure, and I have had this habit for twenty years.

  A.a; the

  B.the; a

  C./; the

  D./; /

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• 6Many lifestyle patterns do such ______  great harm to health that they actually speed up ____ weakening of the human body.    

  A.a; /

  B./; the

  C.a; the

  D./; /

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• 7It's really ____ fun to walk alone with _______ full moon hanging in the sky.

  A.a; the

  B.a; 不填C the; aD.不填; a

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• 8Working there calls for ____ patience, but it is really ____ useful experience for me.

  A.the; /

  B./; a

  C./; an

  D.a; a

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• 9If my train is on ____ schedule, I will be home at  ____ midnight.

  A.the ; the

  B.; the

  C.a;

  D.;

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• 10Four and  ________ half hours of discussion took us up to midnight，and  ________ break for cheese，chocolate and tea with sugar.

  A.a；a

  B.the；the

  C.不填；the

  D.a；不填

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