问题补充：
第二节: 语法填空
Vitamins are a group of substances（物质）found in food. The body needs them for life and health. So usually, many people care for 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 reasons. And this has to do with their 11_ --- the food they take in. A person eating a good variety of food get all the vitamins now 12 (know) to be needed.
The problem is that there are many people who don’t 13_ foods wisely. So the answer 14 this question is: No extra 15_ are needed, 16 you eat proper foods. In fact, many of the vitamins cannot be 17_ （store） in the body, so when extra vitamins are taken in, the body simply gets rid of them. It is even 18 (harm) to put too much of certain vitamins into the body. This has been found to be 19 (truth) of vitamin A and D, when 20 amounts are taken in.11.diet 12 . known 13. choose 14. to 15. vitamins
答案：
(答案→)11.diet 12 . known 13. choose 14. to 15. vitamins
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