As for me, I think pets are very useful.

Firstly, it is good for culturing peoples love and sense of responsibility. Keeping a pet, you must feed it. Several times a day, in that case, you will feel it is your duty.　　F, pets could be a faithful friend, and playing with it will bring one happiness.　　In, the phenomenon of the empty nest old can easily be found anywhere in our daily life. In the case, I think keeping a pet could remove their loneliness, even though at their childrens absence.