Our environment is getting{#blank#}1{#/blank#} than before. Now more and more people realize that we should do something to help the Earth. Here are the things we can do to help the Earth: We can recycle glass, metal and paper. We shouldn't throw{#blank#}2{#/blank#} in the garbage can（垃圾箱）! We can{#blank#}3{#/blank#} instead of driving cars! We should try to{#blank#}4{#/blank#}  short showers and turn off all the{#blank#}5{#/blank#} and the TV when we leave the room. All of these things will help the Earth.

    One of my best friends, Bob, has a very large police dog named Jack. Every Sunday 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 stayed there fora{#blank#}1{#/blank#} time and my friend and I had a longer talk with each other than ever before. Soon it was time for them to take a walk in the park. We {#blank#}2{#/blank#} that, so Jack became worried about it. He walked around the room several times and then sat down in front of me and looked at me.

    But I still paid {#blank#}3{#/blank#} attention(注意) to him. I went on talking with my friend. {#blank#}4{#/blank#} Jack could not wait any longer. He went out of the room and came back a few minutes later. He sat down in front of me again. But this time, he held my hat in his {#blank#}5{#/blank#} . Soon I understood what Jack meant and so did my friend.