Since earth creatures cannot breathe in the moon's atmosphere, we can safely say that _____.

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• 1In talking about the question of where the moon came from, Professor Wetherill of the University of California said that he believes that the answer is _____.

  A.going to be found by 1990 at the latest

  B.that the moon was once part of the earth

  C.a chmd of gas and dust thom which both the earth and the sun were born

  D.probably something no one has thought of yet

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• 2The surface of the moon is _____.

  A.so hot that it warms the earth

  B.much colder at all times than the earth

  C.about the same as that of the earth in terms of heat and cold

  D.sometimes much hotter, sometimes much colder than the earth

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• 3The atmosphere of the moon is _____ that of the earth.

  A.much the same as

  B.harder to see than

  C.much different from

  D.cleaner than

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• 4The paragraph following the passage most likely discusses _____.

  A.unusual ways to advertise products

  B.types of payment plans for service

  C.theories about how products affect different levels of society

  D.how certain elements of a price "package" influence its market value

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• 5In the last sentence of the passage, the word "they" refers to _____.

  A.return privileges

  B.all the factors

  C.buyer and seller

  D.money

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