Men have kept pets since ancient times. We can see from discoveries in the pyramids in Egypt and from scenes on decorated wall-coverings of European castles that our ancestors were as in-terested in pets as we are.
　　One reason for keeping pets is their utility. When our dog barks, it warns us of thieves. A cat keeps down the mice and rats in homes. When men depended on hunting for food they found hunting-dogs extremely useful. They also used a type of bird to aid them in their search for food.

　Companionship is a non-utilitarian reason for keeping pets. If people are living by themselves they feel lonely, and having a pet relieves this loneliness to some extent. We like to have some companion with us even if this companion is not human. We feel the need to have another living being to share our daily lives. Having a companion, even if it is only an animal, gives us a feeling of warmth and an interest in something else beyond ourselves.

　　Some people even prefer pets to other people. Pets are not as demanding as people sometimes are. In rticular,pets do not demand of us that we should talk when we wish to remain silent. Some people do talk to pets as if they were human beings, but they have the satisfaction of knowing that the pets cannot answer back and engage them in argument. Pets seem content with so very little.

关于对在校园里养宠物的看法_英语作文
In my opinion, raising pets in the school is not good.There are some reasons.School is the place for learning. If having pets in the school, the pets will certainly attract the attention of the students when the strudents are having classes.In addition, the pets should be kept by someone to make them healthy and clean, which will raise the cost of the management. However, I am surely in support of raising pets in one`s home.