题目：
Coffee has been a part of people’s lives for thousands of years,and today it is still one of the favorite drinks in the world.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 day in the right way.So they say a cup of coffee is necessary for them in the morning.
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（精力和体能）.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.
50 A good title for this passage is ________.
A coffee Is Harmful B Coffee and Tea
C Caffeine and Health D Caffeine Is Useful
51 The word “augment” means________.
A increase drink C stop D make less
52 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 asleep
C keep you awake D be dangerous
53 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 foods
54 Which of he following is NOT TRUE?
A Coffee has been a part of people’s lives for thousands of years.
B Caffeine does no harm to our body.
C Two cups of coffee will make you breathe faster and increase body heat.
D Caffeine may increase humans’ mental and physical abilities.
答案：CACDB
