The origin of ____ life on earth is ____ question that interests astronomers.

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• 1I ate _____ sandwich while I was waiting for _____ 20:08 train.

  A.the, a

  B.the, the

  C.a, the

  D.a, a

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• 2Jumping out of _____ airplane at ten thousand feet is quite _____ exciting experience.

  A.不填; the

  B.不填; an

  C.an; an

  D.the; the

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• 3Word came that my best friend Tom was accepted by ___ Oxford University, and I planned to goto ____ cinema with him for ____ celebration.

  A./; the; a

  B.the; /; a

  C.the; /; the

  D.the; the; the

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• 4— How do you find ____ dress in the shop window? 　 — Oh, it's beautiful. She will be pleased if she can have it as ____ birthday present.

  A.a; a 　　　　

  B.a; the 　　　

  C.the; a 　　　

  D.the; the

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• 5The journalists at home and abroad are greatly impressed by the fact that ____ volunteers from all walksof life are working hard to build ____ new Yushu.

  A./; a

  B.the; /

  C./; /

  D.the; a

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• 6We should have _____ sense of responsibility to do something to help _____ poor whenever they are in_____ trouble.

  A.a; 不填; the

  B.a; the ;不填

  C.不填; the; the

  D.a; the; the

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• 7It is well known that ______ dolphin is _______ intelligent animal.   

  A.the; the

  B./; an

  C.the; an

  D.a; the

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