Recently we have had a heated debate on whether people should keep pets at home in cities。
Some students thought keeping pets could comforted elderly，made their life better。But others thought keeping pets could cause environmental pollution easily，and some animals may hurt people。
In my opinion，we can keep pets at home in cities if we can look them after well and make them friendly to everyone。We must keep them without affecting others，too。But if your neighbors or your relations hate pets，you had better not keep pets。
These are my opinions。What about you?What do you think of this question?