精选优质文档-倾情为你奉上6.Some people think that zoos are cruel and all the zoos should be closed. However, other people think that zoos are useful to protect the rare animals. Discuss both views and give your own opinion. Currently, the discussion about whether to close zoos is becoming popular. Some people proclaim that zoos are cruel and all should be closed, on the other hand, towards the same issue, some others are confident that zoos are useful to protect rare animals. It is quite natural tha
