A young father was visiting an old neighbour. They were standing in the old man’s garden, and talking
about children. The young man said, “How strict(严格的)should parents be with their children?"
    The old man pointed to a string(绳子)between a big strong tree and a thin young one.
    "Please untie(解开)that string," he said. The young man untied it, and the young tree bent(弯曲)over
to one side.
    "Now tie it again, please,” said the old man. “But first pull the string tight(紧)so that the young tree is
straight again.”
     The young man 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."
1. The story 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 one with his old neighbour    
D. how to tie trees
2. The young man untied the string _______.
A. in order to(为了)throw it away          
B. so that both of the trees would grow straight
C. only to know how the trees grew          
D. only to find that one tree bent over to one side
3. _______, the string could be taken away.
A. When the old man left                    
B. When the young man untied it next time
C. When the young tree grew strong enough    
D. When the young tree died
4. At last the old man told the young man _______.
A. that he should be strict with 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 not look after his children
5. We learn that the big strong tree and the thin young one are like _______.
A. the young father the old neighbour          
B. parents and their children
C. the old neighbour and his friends              
D. the parents and their friends