听力原文： Is your family interested in buying a dog？ A dog can be a happy addition to your family, but if you choose the wrong kind of dog, the consequences can cause you a lot of trouble.
Families are the ones who want the dog, the parents are the ones who are really responsible for seeing that the animal is properly cared for. If you don't know much about dogs, it's a good idea to go to the library or the ASPCA for books about various kinds of dogs, as well as books about how to train a puppy. In reading about the different breeds, you should know that a dog described as very alert may be too jumpy and bouncy. When a book describes a dog as an ideal bunting dog, it probably means that the dog won't be happy living in a small apartment. Dog breeds vary in popularity as the years go by. One of the most popular dogs these days is the German shepherd. This is because it provides protection as well as companionship. The family should be warned that these dogs grow up to be very big, and may be too powerful for children to handle. If space is limited, a toy dog may be a good choice. These dogs are very small and easy to train. They don't need to be walked daily, since they can exercise in the space available in the home.
(30)

A. The care and proper selection of dogs for family pets.
B. Different breeds of dogs.
C. Responsibility for seeing that dogs are properly cared for.
Different kinds of books about dogs.