Many scientists believe our love of sugar may actually be an addiction. When we eat or drink sugary foods, the sugar enters our blood and affects the parts of our brain that make us feel good. Then the good feeling goes away, leaving us wanting more. All tasty foods do this, but sugar has a particularly strong effect. In this way, it is in fact an addictive (使人上瘾的) drug, one that doctors suggest we all cut down on.

       “It seems like every time I study an illness and trace a path to the first cause, I find my way back to sugar,” says scientist Richard Johnson. One-third of adults worldwide have high blood pressure, and up to 347 million have diabetes (糖尿病). Why? “Sugar, we believe, is one of the causes, if not the major cause,” says Johnson.
       Our bodies are designed to survive on very little sugar. Early humans often had very little food, so our bodies learned to be very efficient in storing sugar as fat. In this way, we had energy stored for when there was no food. But today, most people have more than enough. So the very thing that once saved us may now be killing us.
         ★ It’s obvious that we need to eat less sugar. The trouble is, in today’s world, it’s extremely difficult to avoid. From breakfast cereals to after-dinner desserts, our foods are increasingly filled with it. Some producers even use sugar to replace taste in foods that are advertised as low in fat. So while the foods appear to be healthier, large amounts of sugar are often added.
       But some people are fighting back against sugar and trying to create a healthier environment. Many schools are replacing sugary desserts with healthier choice, like fruit. Other schools are trying to encourage exercise by building facilities like walking tracks so students and others in the community can exercise. The battle has not yet been lost.
【小题1】What do scientists think of sugar?

A．It makes us feel good and want more of it.	B．Tasty foods are full of sugar.
C．It has a strong effect on our blood.	D．It should be taken under a doctor’s guidance.

【小题2】In paragraph 3, the phrase “the very thing” refers to ________.

A．the amount of sugar in our food	B．having enough food to survive
C．our ability to store sugar as fat	D．the importance of sugar for early humans

【小题3】According to the passage, why is it so hard to avoid sugar?

A．It gives us needed energy.	B．It’s in so many foods and drinks.
C．We get used to eating it at school.	D．We cannot survive without it.

【小题4】Which of the following can be put in ★ ?

A．Should we eat no sugar?	B．How harmful is sugar in our diets?
C．Is sugar really that bad for us?	D．So what is the solution?

【小题5】What is the genre (体裁) of this passage?

A．A profile about ways to avoid sugar.	B．A story about illnesses caused by sugar.
C．An essay about our addiction to sugar.	D．A drama about reasons for loving sugar.