Most tachometers measure the speed of rotation of a _____ shaft or wheel in terms of revolutions per minute.

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• 1The main features of the telegraph were developed by two inventors,but it was Samuel Morse who successfully _____ their ideas.

  A.financed

  B.publicized

  C.synthesized

  D.disproved

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• 2The plan agreed on by both parties fell _____ because of the accident.

  A.out

  B.off

  C.for

  D.through

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• 3Robert did not hear the bell because he was completely _____ in his reading.

  A.disguised

  B.suspended

  C.confirmed

  D.absorbed

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• 4If the government _____ a law,it ceases to be a law.

  A.avoids

  B.appeals

  C.repeals

  D.concedes

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• 5We couldn′t buy anything here because trade in the town is _____ .

  A.depressed

  B.deprived

  C.volleyed

  D.drizzled

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• 6He paid her a _____ by saying her cake was the best he had ever eaten.

  A.proposal

  B.compliment

  C.gratitude

  D.satisfaction

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• 7Mercury′s _____ is so much greater than the Earth′s that it completes more than four revolutions around the Sun in the time it takes Earth to complele one.

  A.velocity

  B.orbit

  C.weight

  D.diameter

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• 8The flowers in the vase _____ because they had no water.

  A.withered

  B.sweated

  C.decreased

  D.ripened

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• 9Although salmon may travel hundreds of miles from where they were spawned,they will _____ return there to lay eggs.

  A.probably

  B.reluctantly

  C.apparently

  D.ultimately

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• 10Because of a _____ in his vision,Joe had to wear glasses.

  A.defect

  B.glint

  C.scowl

  D.fliecker

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