—can you hear the ( ) of children's laugh?—why are they so h

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—can you hear the ( ) of children's laugh?—why are they so happy?A.sound B,noise C.voice
答案给的是A,偶认为应该选C,请问如何解释呢?

A 是声音sound作“声音”,“响声”讲时,可以指人或动物发出的声音,或物体碰撞的声言.这个词的使用范围很大.可以说,大自然的任何“声音”都可以用sound.
voice一般指人的声音,说话、唱歌.谈笑都可用voice.sound和noise不仅能指人的声音,还可以表示别的动物发出的声音;而voice除了有时可指鸟的声音外,很少表示其它动物的声音.

—can you hear the ( ) of children's laugh?—why are they so h What's the matter?Why are you laugh/laugh-ing? Can you hear the sound of children ______(play) outside? Why do you laugh ______ your photos Are they funny? can you hear the noise of the children ____ in the classroom They are wonderful,（so because thought） I can't hear the wor "the children are so excited that they can’t w...to open the —Why are you looking so tired? They can hear the air bubbles coming from you scuba gear,so The children are so young that they can’t look after t（）_.填英语翻译1、Why are you so beautiful?2、Why the color of the leaf i that's why you are so silly