The largest part ofthe light energy directed towards the earth is________

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• 1Of the sun’s total output of radiant energy, the earthreceives________

  A.one tenth

  B.one millionth

  C.all that comes from the surface of the sun

  D.a very small portion

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• 2He_______working till he was seventy years old.

  A.kept up

  B.kept on

  C.kept to

  D.kept out

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• 3There are four departments at this college, __________ more than five hundred students.

  A.with each have

  B.each having

  C.each of them have

  D.with each is having

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• 4Robert looked as if he were about to________when his motives were questioned.

  A.flare up

  B.jump up

  C.burst up

  D.look up

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• 5It has always been the __________of our firm to encourage workers to take part in social activities.

  A.plan

  B.campaign

  C.procedure

  D.policy

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• 6The old gentleman never fails to help_______is in need of his help.

  A.Who

  B.Whoever

  C.One

  D.whomever

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• 7The government placed __________ on the numbers of foreign cars that could be imported.

  A.limitations

  B.restraint

  C.requirements

  D.restrictions

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• 8It 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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• 9No sooner had I closed the door than somebody started knocking __________it.

  A.on

  B.with

  C.to

  D.for

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• 10As we know, physics __________the science of energy.

  A.was

  B.were

  C.is

  D.are

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