The author mentions "pick-me-up" to indicate that

试卷相关题目

• 1We can conclude from this passage that ballet

  A.is a dying art

  B.will continue to change

  C.is currently performed only in Russia

  D.is often performed by dancers with little training

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• 2Who had an important influence on early ballet、

  A.Balanchine

  B.Antoinette

  C.Louis XIV

  D.Diaghilev

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• 3Professional ballet was first performed in

  A.Italy

  B.Russia

  C.America

  D.France

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• 4The word "pageants" in paragraph 2 means

  A.dances

  B.big shows

  C.instruction

  D.royal courts

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• 5This passage deals mainly with

  A.famous names in ballet

  B.how ballet has developed

  C.Russian ballet

  D.why ballet is no longer popular

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• 6Which of the following tells us how caffeine affects sleep、

  A.It blocks production of the enzyme that stops melatonin production.

  B.It interrupts the flow of the hormone that prevents people from sleeping.

  C.It halves the body's levels of sleep hormone.

  D.It stays in the body for many hours.

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• 7What does Paragraph 3 mainly discuss、

  A.Different effects of caffeinated coffee and decaf on sleep.

  B.Lotan Shilo's research design on sleep.

  C.What the subjects did after drinking decaf at night.

  D.Why some subjects took half an hour to fall asleep.

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• 8The experiment mentioned in Paragraph 4 finds that caffeine drinkers

  A.produce less melatonin

  B.sleep longer than decaf drinkers

  C.produce more urine at night

  D.wake up every three hours

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• 9Ohayon advises coffee lovers

  A.to drink less coffee during the day

  B.to take decaf after lunch

  C.not to go to bed after taking coffee

  D.not to drink coffee after supper

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• 10Why didn't the French scientist continue to make the medicine that stopped pain、

  A.It didn't work well.

  B.It was hard to make.

  C.It hurt the stomach.

  D.It was not cost-effectiv

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