Most American children eat potatoes every day，but they do not know which part of the potato is the most nutritious（营养）．Take a sharp knife and cut a very thin slice（一片）from it and hold it to the light，you will see that the potato has skin（皮），an outside rim（外缘）and the inner part．The outside rim which is right under the skin is the most nutritious．But this part is often thrown away with the skin．Even the skin itself is better for food than the inside．When eating a cooked potato．if you choose the inside and leave the outside，you are wasting（浪费）the best part of it．If you can’t eat the whole potato，it is better to eat the outside rim and leave the inner part．
How many parts does a potato have?

A．Only one．

B．Two．

C．Three．

D．Four．

Which of the following is the most nutritious part of the potato?

A．The middle．

B．The skin．

C．The outside rim．

D．The inside．

In fact，the skin is________．

A．not good at all

B．better than the inner part

C．better than the outside rim

D．as good as the outside rim

If you can’t eat the whole potato，you’d better eat________．

A．the skin only

B．the part right under the skin

C．the inner part

D．the part outside the rim

This passage mainly tells us________．

A．what is a potato made up of

B．when to cook potatoes

C．how to cut potatoes

D．how to eat potatoes

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