综合填空。用方框中所给的词的适当形式填空，使短文正确、通顺。每词限用一次（满分10分）

For, time, visit, few, name, run, park, clever, have, worry

Almost everyone likes dogs, and almost everyone likes reading stories about dogs.
I      a friend. He has a large police dog. Its       is Jack. Police dogs are often very   . Every Sunday afternoon my friend takes Jack for a walk in the     . Jack likes these long walks very much.
One Sunday afternoon a young man came to      my friend. He stayed a long time. He talked and talked. Soon it was time     my friend to take Jack for a walk. But the visitor still stayed. Jack became very    . He walked around the room several      and then sat down in front of the visitor and looked at him. But the visitor paid no attention. He continued talking. Finally Jack couldn’t bear it. He went out of the room and came back a         minutes later. He sat down again in front of the visitor but this time he held the visitor’s hat in his mouth and     out of the room.