You're driving too fast. Have you noticed that there is a speed________of 40 miles per hour along this road、

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• 1He makes it a________to put some money aside each month.

  A.discipline

  B.principal

  C.principle

  D.essential

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• 2—Let's try operating the machine right now.—Wait. Better read the ________ first.

  A.instructions

  B.explanations

  C.information

  D.introduction

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• 3Small businesses are finding it hard to survive in the present economic________.

  A.atmosphere

  B.world

  C.climate

  D.condition

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• 4Those who suffer from heart trouble will find they get ________ from this medicine.

  A.defense

  B.safety

  C.shelter

  D.relief

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• 5Though Mark wasn't well educated, his common________guided him through a life.

  A.sense

  B.ground

  C.place

  D.practice

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