Be quiet! You should speak in a low____ A sound B noise C voice D whisper 请说明原因!~!~!

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Be quiet! You should speak in a low____ A sound B noise C voice D whisper 请说明原因!~!~!
Be quiet! You should speak in a low____ A sound B noise C voice D whisper 请说明原因!~!~!

Be quiet! You should speak in a low____ A sound B noise C voice D whisper 请说明原因!~!~!
C,in a low voice小声说话,voice是说话的嗓音

C
嗓音voice

答案是C You should speak in a low voice 你应该小声说话
sound 是声音 noise 是噪音 whisper 是小声耳语

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sound 指自然界中的声音。noise 指噪音。voice指声音noise是名词，指吵闹，
noisy是形容词，指吵闹的，形容噪音
noise/voice/sound的区别如下：
这三个词都作“声音”解，在表示“听到声音”这个意思时，三者可以通用。
I heard a sound/noise/voice（我听到一个声音）。
但它们又各有特定的含义。
* sound 作“声音”解，含义最广，指可以听到的任何声音。
a weak sound 微弱的声音
a sharp sound 尖锐的声音
an eardeafening sound 震耳欲聋的声音
* noise 作“噪音”，“嘈杂声”、“吵闹声”解，特指不悦耳，不和谐的声音(loud and unpleasant sound)。它既可作可数名词，也可作不可数名词。
* voice 作“声音”解时，多指人发出的声音，包括说话声、歌声和笑声，有时也用于引申意义，作“意见”、“发言权”解。
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选C. 因为这是个固定词组：in a low voice "小声地“

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