The government placed __________ on the numbers of foreign cars that could be imported.

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• 1It is difficult for us to explain phenomena that we have little or __________direct knowledge.

  A.no any

  B.no

  C.none

  D.nothing

   

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• 2No sooner had I closed the door than somebody started knocking __________it.

  A.on

  B.with

  C.to

  D.for

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• 3As we know, physics __________the science of energy.

  A.was

  B.were

  C.is

  D.are

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• 4These courses, if properly conducted, will________the minds of the students.

  A.refresh

  B.renew

  C.Stimulate

  D.encourage

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• 5The train __________ of the station right on time.

  A.pulled

  B.pulled down

  C.pulled on

  D.pulled out

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• 6He is very__________ in using money.

  A.economic

  B.economical

  C.economy

  D.economize

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• 7We substitute fish ______ meat several times a week.

  A.for

  B.to

  C.with

  D.and

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• 8It was not________1957 that he went back to America.

  A.Since

  B.until

  C.Before

  D.after

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• 9Your comments ________my work have proved to be helpful.

  A.in

  B.for

  C.on

  D.against

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• 10Traditionally,universities have carried out two main activities: research and teaching. Many experts

  A.traditional universities do a good job serving the society

  B.universities must meet the needs of the society

  C.research and teaching are of great importance inuniversities

  D.universities play an important role in our society

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