_____ how mirrors produce image, we need to know what light does.    

试卷相关题目

• 1Tom asked the candy makers if they could   make the chocolate easier ____ into small pieces.   

  A.break

  B.breaking

  C.broken

  D.to break

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• 2_____ the burden of carrying heavy school bags, some schools introduced iBooks a few weeks ago.

  A.Eliminating

  B.Eliminated

  C.To eliminate

  D.Having eliminated

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• 3With a lot of problems ____, the newly-elected president is having a terrible time  every day.    

  A.settled

  B.settling

  C.to settle

  D.to be settled

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• 4he machine doesn't work. I have to get it _____.   

  A.repair

  B.repairing

  C.repaired

  D.to repair

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• 5The patient was warned _______ oily food after the operation.    

  A.to eat not

  B.eating not

  C.not to eat

  D.not eating

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