Vitamins are a group of substances found in food. The body needs them for life and health. So naturally, many people are concerned with the question: Am I getting enough vitamins, and am I getting the right kind? Even though very small amounts of each vitamin are enough for the needs of the body, the worry people have about vitamins has some basis. And this has something to do with their diet-- the food they take in. A person eating a good variety of foods gets all the vitamins now known to be needed (with the possible exception of Vitamin D). The problem is that there are many people who don't choose foods wisely, don't get enough variety, and don't eat the basic foods they need to gettheir vitamins. So the answer to this question is: no extra vitamins are needed, providing you eat proper foods. In fact, many of the vitamins cannot be stored in the body, so when extra vitamins taken in, the body simply gets rid of them. It is even harmful to put too much of certain vitamins into the body. This has been found to be true of Vitamin A and D, when large amounts are taken in. What foods supply what vitamins? Here is a quick general idea. Vitamin A, for the health of the eyes, skin, teeth, and bones, is found in green vegetables, fruits, eggs, liver and butter. Vitamin BI which helps the nervous and digestive system and prevents certain diseases, is found in cereals, pork and liver. Vitamin B2 is found in milk, eggs, green vegetables and meats. Vitamin C, which helps bones and teeth, is found in tomatoes, certain fruits and vegetables. These are only a few of the most important vitamins the body needs.
单选题
Vitamin A is needed by ______ and can be found in ______ A. bones pork B. nervous system milk C. eyes green vegetables D. teeth meats
【正确答案】
C
【答案解析】[解析] 根据文中最后一段的“Vitamin A，for the health of the eyes，skin，teeth，and bones，is found in green vegetables，fruits，eggs，liver and butter．”可知，维生素A对眼睛、皮肤、牙齿和骨骼 的健康有益，它存在于绿色蔬菜、水果、蛋、肝脏和黄油中。四个选项中，只有c项完全正确。
单选题
Vitamin C helps ______ while Vitamin B1 is very important to ______ A. teeth digestive system B. skin bones C. bones liver D. eyes meats
【正确答案】
A
【答案解析】[解析] 根据文中的“Vitamin C，which helps bones and teeth，is found in tomatoes，certain fruits and vegetables．”可知，维生素C对骨骼和牙齿有益，因此B、C两项不对。根据文中 的“Vitamin B1 which helps the nervous and digestive system and prevents certain diseases，is found in cereals．pork and liver．”可知，D项不对。因此正确答案为A。
单选题
Vitamins are a group of substances found in______ A. body B. food C. pork D. digestive system
【正确答案】
B
【答案解析】[解析] 根据文中第一句话“Vitamins are a group of substances found in food．”可知，维 生素是在食物中被发现的一组物质。因此B项为正确答案。
单选题
The body needs ______ for life and health. A. extra vitamins B. a good variety of vitamins C. large amounts of certain vitamins D. small amounts of each vitamin
【正确答案】
D
【答案解析】[解析] 根据文中第二段的“Even though very small amounts of each vitamin are enough for the needs ofthe body,…”可知，每种维生素只要很少的量就足够满足人体的需要了。因此D 项为正确答案。
单选题
If you take in more vitamins than you actually need,______ A. they are harmful to your body B. you get all the vitamins now known to be needed C. they help our bodies more properly D. your body simply gets rid of them
【正确答案】
D
【答案解析】[解析] 根据文中第三段的“In fact，many ofthe vitamins cannot be stored in the body，so when extra vitamins taken in．the body simply gets rid of them．”可知，当多余的维生素摄入体内 时，人体就会把它们排除掉。因此D项为正确答案。