The vitamins (维生素) are named by letters of the alphabet (字母表). Vitamin A is needed by the eyes. There is Vitamin A in milk, butter, and green vegetables. It can be kept by the body.
Vitamin B cannot be kept. It must be supplied all the time by some of the food we eat.
Vitamin C is very important to the body. Without it men’s teeth become loose (松的) and their arms and legs get weak. Lemons (柠檬), oranges and tomatoes have Vitamin C in them.
Vitamin D is the sun vitamin. We get it in milk and eggs and from sunlight on our skin (皮). There are other Vitamins, but these A, B, C and D, are the most important.
小题1:There are many kinds of vitamins, the most important of which are ______.

A．Vitamin A	B．Vitamin B and C
C．Vitamin D and A	D．Vitamin A ,B,Cand D

小题2:There are both Vitamins A and D in ______.

A．green vegetable

B．sunlight

C．butter and eggs

D．milk

小题3:If somebody is near-eye sighted probably he needs ______. 

A．Vitamin A

B．Vitamins A and C

C．Vitamin D

D．Vitamin B

小题4:We can get Vitamin D when ______.

A．we have bread and butter for our breakfast	B．we are eating fruits
C．we are working in the field in the sun	D．we are having eggs