The Peacock and the Crane（在线收听）

    A peacock，spreading its gorgeous plumage，mocked a cranethat passed by，ridiculing the ashen hue of its feathers，“I am robed，like a king，in gold and purple，looking as splendid as the rainbow；while you have not a bit of colour on your wings．”
    “True，”replied the crane，“but I can soar to reach the heights of heaven，and lift up my voice to reach the stars，while you can just walk below，like a cock，among the birds of the dunghill．”
    Fine feathers don't make fine birds．Exercises：
    回答下列问题：
    ①Why did the peacock mock a crane？
    ②What did the crane say facing the peacock's ridicule？
    ③What does the fable tell us？
    ④What can we learn from the fable？