短文改错。

     A boy who was cleaning the shoes in the street said to a young man passed by, "Let me clean your boots.

It just spends you only a penny." But the man refused. Then the boy told him that he will clean his boots for

nothing. The man agreed, and soon one of boot shone brightly. Then he put the other boot on the box, and

the boy refused to clean it if he was paid two pence for his work. The young man refused pay for anything and

went away. But the well-cleaning boot made the dirty one so bad that he could not walk on. He returned back

and gave the boy two pence.

________________________________________________________________________________________

A management domain typically contains a large amount of management information. Each individual item of（）information is an instance of a managed object type. The definition of a related set of managed（）types is contained in a Management Information Base (MIB) module. Many such MIB modules are defineD. For each managed object type it describes, a MIB（）defines not only the semantics and syntax of that managed object type, but also the method of identifying an individual instance so that multiple（）of the same managed object type can be distinguisheD. Typically, there are many instances of each managed object（）within a management domain.

For each managed object type it describes, a MIB（）defines

A．connection

B．window

C．module

D．destination