Vitamin A helpsprevent skin and other tissues from becoming dry.People who do not get enoughvitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It
also is in theyellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits andvegetables contain substances that the body can change into vitamin A.
Vitamin B-onechanges starchy（含淀粉的）foodsinto energy. It also helps the heart and nervous system work smoothly.Withoutit,we would be weak and would not
grow.Vitamin B-oneis found not just in whole grains like brown rice,but also in other foods.Theseinclude beans and peas,nuts,and meat and fish.
Vitamin B-twelve isneeded so folic acid（叶酸）cando its work. Together, they help produce red blood cells.Vitamin B-twelve isfound naturally in foods such as
eggs,meat,fish andmilk products.Folic acid has been shown to prevent physical problems in babieswhen taken by their mothers during pregnancy.Vitamin B-twelve is found
in green leafyvegetables and other foods,like legumes and citrus fruits.In some countries,itis added to products like bread.
Vitamin C is neededfor strong bones and teeth,and for healthy blood passages.It also helps woundsheal quickly.The body stores little vitamin C.So we must get it every day
in foods such ascitrus（柑橘类）fruits,tomatoesand uncooked cabbage.
Vitamin D increaseslevels of the element calcium in the blood.Calcium is needed for nerve andmuscle cells to work normally.It also is needed to build strong
bones.Ultravioletlight from the sun changes a substance in the skin into vitamin D.Fish liveroil also contains vitamin D.
Vitamin K is neededfor healthy blood.It thickens the blood around a cut to stop bleeding. VitaminK can be found in pork products,liver and in vegetables like cabbage,kale
and spinach.
A.Right
B.Wrong
C.Not mentioned