阅读短文，判断正误。

    In the Noise Kingdom(王国), people like to make noise. They did everything loudly. Everyone was a noisy neighbour.

    The king's birthday was coming. He wanted to hear the loudest(最大声的) noise in the world. So all the people must shout together at twelve o'clock on his birthday.

    Everyone wanted to hear the loudest noise in the world. A boy said, "Let's just open our own mouths and listen." All the people heard about his idea.

    At twelve o'clock on the king's birthday, all the people just open their mouths and listen. They heard the sounds of the birds and the rivers.

    The king said, "What nice sounds! I like them." After that, the Noise Kingdom became quiet. People did everything quietly.