【正确答案】 C

【答案解析】voice意为“说话声，嗓音”。如．The new teacher speaks in a very sweet voice．新来的老师说话声音很甜。sound指一般意义上的“声音”。如：the sound of running water(流水声)。noise意为“喧闹声”。如：Don't make so much noise．不要这样吵闹。speech表示“演讲，发音，讲话”。如：We were all deeply moved by his speech．我们都被他的演讲感动了。