It is not always easy for the public to see _____ use a new invention can be of to human life.

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• 1This painting is so valuable that it is rather difficult to calculate _______ its price would be if the museum _______ to sell it.

  A.how much; would want

  B.what; wanted

  C.what; wants

  D.how much; wants

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• 2The growing speed of a plant is influenced by a number of factors, ______ are beyond our control.

  A.most of them

  B.most of what

  C.most of which

  D.most of that

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• 3Although many of the houses in the small town ______ still in need of repair, there _____ lots of improvement in their appearance.

  A.are, has been

  B.is, have been

  C.is, are

  D.are, was

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• 4Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.  

  A.what, when

  B.that, which

  C.what, which

  D.which, that

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• 5____ interested in English may join this club.

  A.Whoever

  B.All who

  C.Anyone

  D.Who

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