Many scientists believe our love of sugar may actually be an addiction (瘾). When we eat sugary foods, the sugar enters our blood and influences 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 stronger effect.

“It seems that every time I study an illness, I find the sugar is the main cause,” says scientist Richard Johnson. One third of adults have high blood pressure, and up to 347 million adults have diabetes (糖尿病). Why? “Sugar, we believe, is one of the main reasons,” says Johnson.

Our bodies are designed to survive on very little sugar. Early humans often had very little food, so our bodies learned to keep sugar as fat. In this way, we had energy stored for the time 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 clear that we need to eat less sugar. The trouble is, in today’s world, it’s very difficult to avoid. Our foods are increasingly filled with it. Some manufacturers (制造商) even add much sugar to foods that are advertised (做广告) as what are low in fat. This may make the food appear healthier, but too much sugar may be harmful.

But there are those who are fighting back against sugar. Many schools are offering more fruit instead of desserts. Other schools are building facilities for students to do exercise. The battle (战斗) has not yet been lost.

根据材料内容选择最佳答案。
【小题1】Why is sugar addictive?

A．Tasty foods are full of sugar.

B．It has a strong effect on our blood.

C．It makes us feel good and want more of it.

【小题2】From the passage, why is it so hard to avoid sugar?

A．It gives us the needed energy.

B．It is in so many kinds of foods.

C．We get used to eating it at school.

【小题3】What can we learn from the passage?

A．Sugar is the cause of most illnesses.

B．Our bodies need only a little sugar in order to live.

C．Doctors suggest that we should stop eating food with sugar.

【小题4】What is the passage mainly about?

A．Ways to avoid sugar.

B．Our addiction to sugar.

C．Good sugar and bad sugar.

【小题5】What does the writer most probably think of creating a sugar-free (无) world?

A．Useless and wasteful.

B．Necessary and hopeful.

C．Helpful but impossible.