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

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• 1Ohayon 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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• 2The 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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• 3What 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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• 4Which 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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• 5The author mentions "pick-me-up" to indicate that

  A.melatonin levels need to be raised

  B.coffee is a stimulant

  C.neurohormone can wake us up

  D.caffeine can balance our brain hormone

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• 6Why was Felix Hoffmann looking for a painkiller、

  A.His company told him to do that.

  B.His father was in pain.

  C.He wanted to make a lot of money．

  D.He suffered from headach

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• 7Bayer started making aspirin because

  A.it helped prevent heart attacks．

  B.other companies were making it.

  C.it worked well in stopping pain．

  D.the manager was a scientist.

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• 8Bayer aspirin was

  A.the only drug with the name "aspirin"

  B.the first aspirin sold in the United States

  C.not sold in drugstores in 1915

  D.not easy to find in drugstores

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• 9What has happened to aspirin since new painkillers came on the market、

  A.Companies have stopped selling it.

  B.It has become the best-selling painkiller.

  C.Its new use has been discovere

  D.D.Doctors have sold it to patients.

  E.专家也正在研究“数字医生”，并以一种非常舒服的方式完成。

  F.一种检查血糖和细菌的牙刷目前在美国正在被研究。

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