51．________  52．________  53．________  54．________  55．________

    46．________  47．________  48．________  49．________  50．________

    Almost everyone likes dogs，and Almost everyone likes to read s  51  about dogs．

    I have a friend．He has a large police dog n  52  Jack．Police dogs are very clever．Every Sunday afternoon my friend takes Jack for a long w  53  in the park．Jack likes these long walks very much．

    One S  54  afternoon a young man came to visit my friend．He stayed a long time．He talked and talked．Soon it was t  55  for my friend to take Jack for his walk．But the visitor still stayed．Jack became very w  56  ．He walked around the room several times and then sat d  57  in front of the visitor and looked at him．But the visitor paid no attention．He went on t  58  ．

    Finally Jack got a  59  ．He went out of the room and came back a few minutes later．He sat down again in front of the visitor，but this time he took the visitor's cap in his m  60  ．

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