Certain species disappeared or became ________ as new forms arose that were better adapted to the Earth’s changing environment.

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• 1There was once an ________ idea that the earth was flat and motionless.

  A.absurd

  B.intrinsic

  C.eternal

  D.offensive

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• 2Frankly speaking, your article is very good except for some ________ mistakes in grammar.

  A.obscure

  B.glaring

  C.trivial

  D.rare

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• 3Mike just discovered that his passport had ________ three months ago.

  A.abolished

  B.expired

  C.amended

  D.constrained

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• 4The fuel of the continental missile is supposed to be ________ by this device.

  A.ignited

  B.lighted

  C.fired

  D.inspired

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• 5The presidential candidate ________ his position by winning several primary elections.

  A.enforced

  B.enriched

  C.intensified

  D.consolidated

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• 6His ________ directions confused us; we did not know which of the two roads to take.

  A.ambiguous

  B.complicated

  C.arbitrary

  D.intricate

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• 7Franklin D. Roosevelt argued that the depression stemmed from the American economy’s ________ flaws.

  A.underlining

  B.vulnerable

  C.vulgar

  D.underlying

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• 8Some studies confirmed that this kind of eye disease was ________ in tropical countries.

  A.prospective

  B.prevalent

  C.provocative

  D.perpetual

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• 9I am afraid that you have to alter your ________ views in light of the tragic news that has just arrived.

  A.indifferent

  B.distressing

  C.optimistic

  D.pessimistic

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• 10Although he has had no formal education, he is one of the ________ businessmen in the company.

  A.shrewdest

  B.sternest

  C.nastiest

  D.alertest

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