【题目】    We know that if we do not get enough vitamins, we will be at risk of developing a number of diseases. As a result, vitamin supplements (补品), though expensive, are popular with people who worry that they are not getting enough vitamins from the food they eat. And studies found small amount of them do anything to improve health or protect against diseases.

In fact, taking too many of some vitamins can be harmful. For example, too much vitamin E can cause bleeding. People should discuss what vitamins they can take with their doctors, as some vitamins can produce harmful side effects (副作用) when mixed with medicine.

However, sometimes vitamins can help prevent diseases. People who lack a special vitamin should take vitamin supplements. Some older adults may not have enough vitamin B­twelve because the body loses its ability to take it from food as people get older. Besides, people who spend much time inside may need some extra vitamin D, which is taken from sunlight.

Different vitamins are found in different food. Vitamin A is found in fish liver oil (鱼肝油). Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances(物质) that the body can change into vitamin A. Vitamin B­twelve is found in green leafy(多叶的) vegetables and fruits. Vitamin K can be easily found in pork products.

In_fact,_for_most_people,_a_balanced_diet_can_reach_enough_of_the_vitamins_our_bodies_need. So, it is important for us to eat a mixture of food every day to make sure that we get enough vitamins our bodies need.

【1】完成句子：

Vitamin supplements________________ people who worry that they are not getting enough vitamins.

【2】完成句子：

Some vitamins have harmful side effects when ________________ medicine.

【3】简略回答问题：What should people take if they lack a special kind of vitamin?

________________________________

【4】找出并写下第四段的主题句：

________________________________

【5】将文中画线句子译成汉语：

________________________________