John Hayes points out in a recent study that

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• 1Drinking three cups of coffee a day

  A.may not be recommended by most doctors.

  B.is harmful to healthy people.

  C.will probably not cause problems.

  D.may benefit sensitive peopl

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• 2Caffeine withdrawal symptoms

  A.can become an ongoing problem.

  B.may last as long as a week.

  C.are weight loss and mental disorder.

  D.are usually short-lived.

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• 3Some athletes use caffeine to

  A.improve their speed.

  B.increase their endurance.

  C.maintain their alertness.

  D.B.increase their enduranc

  E.C.maintain their alertness.D.relax their muscles.

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• 4Caffeine is used to

  A.reduce high blood pressure.

  B.relieve headaches.

  C.cure liver cancer.

  D.treat skin cancer.

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• 5Drinking coffee or tea may help

  A.lower the incidence of being overweight.

  B.lower the incidence of non-melanoma skin cancer.

  C.increase the incidence of endometrial cancer.

  D.increase the incidence of liver cancer.

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• 6The fourth paragraph describes briefly

  A.the purpose of the study.

  B.the analysis of the research results.

  C.the research methodology.

  D.the conclusion of the study.

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• 7The article argues that supertasters

  A.like snack foods as saltiness is their primary flavor.

  B.like the taste of saltiness to block sweet tastes in food.

  C.consume less salt because they don't like intensive tastes.

  D.like to share salty cheese with nontasters.

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• 8In paragraph 6, the word "pronounced" is closest in meaning to

  A.weary.

  B.strong.

  C.weak.

  D.strang

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• 9The last two paragraphs illustrate that taste acuity is

  A.developed over time after birth.

  B.related to one's eye and hair color.

  C.still unknown to scientists.

  D.genetically determined.

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