Coffee has been a part of people’s lives for thousands of years，and today it is still one of the most popular drinks in the world．Many people in the world begin their busy day by drinking a cup of coffee．They think that a cup of coffee in the morning helps them begin their day in the right way．So they say a cup of coffee is necessary for them in the morning．

    Do you know what makes our bodies and brains active in the coffee？It is caffeine．Caffeine may increase a person’s mental and physical abilities(精力和體能)．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．

1．A good title for this passage is ______．

  A．Coffee Is Harmful    B．Coffee and Tea

  C．Caffeine and Health    D．Caffeine Is Useful

2．The word“augment”means ______．

  A．increase    B．drink    C．stop    D．make less

3．From the passage we learn that drinking a cup of coffee late at night might _______．

  A．give you a headache    B．make you fall asleep

  C．keep you awake       D．be dangerous

4．Caffeine is found in _______．

  A．tea and water    B．chocolate，meat and some other foods

  C．coffee and jam    D．coffee，tea and some other food