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    When a contractor is ready to begin construction of asuperhighway, he makes a preliminary study of the drawings andblueprints supplied by the engineers. He gains mental picture. of the whole jobbefore he begins actual construction.


    1. A.
      preparatory
    2. B.
      extensive
    3. C.
      scientific
    4. D.
      necessary

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    When you have finished the book, please ________ it on the shelf．


    1. A.
      replace
    2. B.
      take place
    3. C.
      take place of
    4. D.
      in place of

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    When ________, the museum will be open to the public next year.


    1. A.
      completed
    2. B.
      completing
    3. C.
      being completed
    4. D.
      to be completed

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    When first ________ to the market, these products enjoyed great success．


    1. A.
      introducing
    2. B.
      introduced
    3. C.
      introduce
    4. D.
      being introduced

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    When I returned to my childhood home，I was distressed to find all the apple trees _________.


    1. A.
      were cut down
    2. B.
      had been cut down
    3. C.
      to cut down
    4. D.
      being cut down

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