题目内容：

We humans are sweet on sugar. That makes sense. All animals need sugar to live. It ' s the fuel that powers our cells. So it' s not surprising that we ' re born to want the sweet stuff.

Sugar stores the sun' s energy like a battery. After a meal,your body breaks down foods into their building blocks. It uses some sugars for energy right away. The rest get stored for the body to break down later. It ' s a myth that sugar makes you extremely excited, but having a sugary snack can give you a quick burst of energy. That ' s because the sugars in sweet foods are easy for your body to turn into fuel. When you eat other kinds of foods,like vegetables, it takes longer for your body to break the sugars down.

These days it' s easy to find sweet snacks. Sodas, candy, cakes and even foods that seem healthy , such as yogurt,can be packed with sugar. Food makers add sugar,because they know that to humans, sweet makes everything taste better. Americans eat about 20 teaspoons of extra sugar everyday. That' s way more than what is good for us.

Eating too much sugar can cause more than a stomach-ache. It can make people overweight, decay the teeth and even cause diabetes. However, experts aren ' t worried about naturally sweet foods- the problem is added sugar. So go ahead and enjoy a sweet apple or even a sugar-rich carrot that are also full of vitamins and other good stuff.

Even cake  is great once in a while , as long as you don ' t overdo it. After all, no one wants life to be dull. And your body needs its fuel!

1.The first two paragraphs are mainly developed by _'

A. cause and effect.    B. problem and solution.

C. giving examples .    D. making comparisons.

2.People may be tncked into eating too much sugar because           .

A. no one wants life to be boring.

B. we ' re born to want the sweet stuff.

C. so-called healthy food can be packed with sugar.

D. sugar is the fuel for the plants and animals on the Earth.

3.What does the author want to stress in Para. 4?

A. We' d better say no to sweet foods.

B. Experts are worried about added sugar.

C. Eating too much sugar is bad for our health.

D. We ' d better consume sugar from natural sources.

4.What can be a suitable title for the text?

A. Sugar Is Everywhere.    B. Sugar Brings Happiness.

C. Why Does Sugar Taste So good?    D. Why Does Sugar Make Us Fat?