How oid is your dather?的中文意思

英文阅读理解(有分),1
A young dather was visiting an old neighbour.They were standing in the old man's garden and talking about children.The young man said,"How strict should parents be with their children?
The old man pointed to a string between a big,strong tree and a thin,young one.
"Please untie that string,"he said,the younger man untied it,and the young tree bent over to one side.
"Now tie it again,please,"said the old man."But first pull string tight so that the young tree is straight again."
The young dather did so.Then the old man said," There ,it is the same with children.You must be strict with them,but sometimes you must untie the string to see how they are getting on.If they are not yet able to stand alone,you must tie the string tight again.But when you find that they are ready to stand alone,you can take the string away."
QUESTION:
51.The stort is about_____
A.how to take care of young trees
B.how strict parents should be with their children
C.how the young father should get on with his old neighbour
D.how to tie the young trees
52.The young man untied the string_______
A.in order to htrow it away
B.so that both of the trees would grow straight
C.only to find that the big trees bent over to one side
D.to let young tree grow itself
53.When could the atring be taken away?
A.When the old left
B.When the young man unties it next time
C.When the young trees grows enough
D.When the young man comes next time
53.At last the old man told the young man _____
A.that he should be strict wit his children if they could not stand alone
B.that he should always be strict with his children
C.that he should be hard on his children
D.that he should learn to plant young trees
55.In the story,the relation of the big tree to the thin young one is like that of_____
A.the young father to the neighbour
B.parents to their children
C.the old neighbour to the children of the young father
D.human beings to plants