According to the passage, a dog named Rico could______.A．recognize the names of about 500

The passage is mainly about ______.A．what dogs can do.B．how to keep dogs.C．dogs and their

The writer of the passage probably______.A．prefer dogs to chimpsB．have done more research

What happened to the dog according to the gardener？A．It suffered a lot before death.B．It d

According to the passage, dogs and cats,A．as well as human beings can not see some colours

According to the passage， Hitler attempted to 查看材料A

According to the narrator, which kind of dogs is thought to have a sense of humor？A．St Ber