Nowadays ,A great many people in cities keep pets.keeping pets becomes a common habit of modern people.However ,Every coin has two sides ,There are many advantages of keeping pets.Firstly ,pets can be a good companions,especially for the person who feels lonely and the olds which can not get out much.secondly,keeping pets can culture our love and sense of responsibility.Last but not the least,some pets can even be a guard for the house.But the people who don't keep pets always complain about that the pets always annoy people by their sounds .what' worse ,sometimes the pets hurt the people who want to be close to them.To sum up,no matter the youngs and the olds,there are a lot of advantages for them to breed a pet,pets can bring many interesting to our life,so in my opinion,it is good to maintain a close relationship with pets.