Coffee has been a part of people’s lives for thousands of years,

Coffee has been a part of people’s lives for thousands of years,
Many people in the world begin their busy day by drinking a cup of coffee or several cups of coffee.They have always said that a cup of coffee in the morning helps them begin their days in the right way.Do you know what in the coffee makes our bodies and brains active?It is caffeine.Caffeine may increase a person’s mental and physical abilities.For example,two cups of coffee will make you breathe faster and augment body heat.All this makes your heart beat faster,and doctors warn that this may be a little dangerous.Caffeine is found in tea,coffee,chocolate and some other foods.A little caffeine is probably not harmful.But too much caffeine can make people nervous and sleepless.(    )11.A.good title for this passage is ____________.A.Coffee Is Harmful      B.Coffee and Tea    C.Caffeine and Health     D.Caffeine Is Useful(    )12.A.The word “augment” means ____________.A.add    B.drink    C.stop    D.make less(    )13.A.From this passage,we may know that drinking a cup of coffee late at night might __________.A.give you a headache    B.make you fall asleepC.keep you wake           D.be dangerous