giải câu này với 20d A lot of people like pets. Dogs and cats(0) ……are…… easy pets because they can eat the meat that we eat. But some people (1)……………………………. pets like birds, lizards and fish. These pets are more difficult. They(2) ……………. different food and different places to live in. It is a good for children to have pets. They can learn a lot(3) …………….. animals. They can learn that some animals like (4)……………………… fruit and vegetables and some animals like plants and grass. It is good to have (5) ……………….. pet. But choose an easy one!