People sometimes like to read stories of dogs very much. They think that dogs are much __1_ cats, sheep, cows or other animals in their homes.

One of my close 2, Bob, has a very large police dog named Jack. Every _3_afternoon, Bob and Jack have a walk in the park nearby. Jack likes these walks very much. One Sunday afternoon, I paid a visit to my friend. I 4 there for a long time and my friend and I had much more talk with each other than before. Soon it was time for them to take a walk in the 5. We forgot that. Jack became worried about it. He walked around the room several times and then6in front of me and looked at me. But I still paid no attention （注意）to him. I went on __7with my friend. At last, Jack could not wait any longer. He went out of the room and came back a few 8 later. He sat down in front of me again. But this time, he held my hat in his __9. Suddenly I 10 what Jack meant and so did my friend.