综合填空。根据首字母提示，完成短文。 Almost everyone likes dogs, and almost everyone likes to read s 1 about dogs. I have a friend. He has a large police dog n 2 Jack. Police dogs are very clever. Every Sunday afternoon my friend takes Jack for a long w 3 in the park. Jack likes these long walks very much. One S 4 afternoon a young man came to visit my friend. He stayed a long time. He talked and talked. Soon it was t 5 for my friend to take Jack for his walk. But the visitor still stayed. Jack became very w 6 . He walked around the room several times and then sat d 7 in front of the visitor and looked at him. But the visitor paid no attention. He went on t 8 . Finally Jack got a 9 . 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 10 . 1.________    2. ________    3. ________    4. ________    5.________ 6.________    7. ________    8. ________    9. ________   10.________