Many people like keeping pets now, because they can give people pleasure. For children, pets are their good
friends. For old people, pets are like their children. Without their children living with them, they feel lonely and
want a pet. Some young people also keep pets because they have few friends. Pets are very popular. But
keeping pets costs much money and takes much time. Sometimes they are very dirty and may spread diseases.
So if we keep pets, we must be careful and take good care of them.
答案不唯一