Parrots are becoming one of the most popular pets in America for good reasons. The parrot

is an extraordinary bird that can be taught to talk, can be easily cared for, and can create a lively atmosphere anywhere. With the help of an energetic parrot owner, a parrot can develop an enormous vocabulary. In addition, a parrot can be trained to say "Pretty boy"or "Polly wants a cracker, "and it also can learn to whistle or sing. No matter what an owner decides to teach a bird, training a parrot takes much patience, but the reward is a stream of chatter. Another reason for the parrot's popularity is that this pet does not require much care. For example, even a spoiled parrot does not need a house-sitter for the purpose of daily walks and daily feeding. In fact, a parrot owner may leave his or her pet with enough food for five days and have no fear that the parrot will overeat. Still another advantage of owning a parrot is its inexpensive food, including seeds, nuts, corn, and grain—along with an apple, banana, or carrot. Perhaps the most likely reason the parrot is becoming such a well-liked pet is that it is a combination of tameness and wildness. Because the parrot can live in almost any environment, it makes a fine, tame companion for many people. In addition, because it can be easily trained, it is a delightful performer. At the same time, its colorful feathers give it an air of the mystery of the parrot's native home, the jungle. Thus, the parrot, once a highly valued gift presented to kings and noble families, is now appreciated by a growing number of people.

A parrot can be trained to do all the following but______.

A．talk

B．help its owner

C．sing

D．create a lively atmosphere