英语阅读理解 in the sea there are many islands,

英语阅读理解 in the sea there are many islands,
In the sea there are many islands.In its warm water there are some little ones.We call them "Coral islands".
A coral island is very nice to look at.It looks like a ring of land with trees,grass and flowers on it.One part of the ring is open to the water.There is a little round lake inside the island.
If you look into this lake,you will see beautiful coral.You may think they are flowers.
If you look at a piece of coral,you will see many little holes in it.In each of these holes a very small sea animal has lived.These sea animals make the coral.
They began to build under the water.Year after year,the coral grew higher and higher.At last it grew out of the water.
Then the sea brought it into small trees and something else.After some years,these things changed into earth.Sometimes the wind brought seeds to this earth.Sometimes birds flew over it and brought seeds to the island.
The little seeds grew.In a few years there were plants all over the island.In a few more years there were trees growing there.
So you see,these islands were built little by little.The workers were very small.Do they not teach us a lesson?Can you think what the lesson is?
56.A coral island looks like _____.
A.a round cake B.trees,grass and flowers C.a ring of land D.a round lake
57.There are ______ in the holes in corals.
A.flowers B.little corals C.grass D.sea animals
58.How did seeds of trees,grass and flowers come to the coral islands?
A.The wind and birds brought them to the coral islands.
B.Only the wind brought them there.
C.People brought them there.
D.Fishes brought them there.
59.From the story we learn that ______.
A.Small workers can not do big thing.
B.Only big workers can do big things.
C.Small workers can do big things if they work hard and work a long time.
D.All small things can do big things.

56.C.a ring of land D
57.D.sea animals
58.A.The wind and birds brought them to the coral islands.
59.C.Small workers can do big things if they work hard and work a long time.