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2. They like talking with each other in a low ________ in class. 3. Can you keep quiet? The ________ will make the baby cry. 4. The ________ from the office sounds like your mother’s. voice sound voice noise 3. Then it was time for people to clean me. 接下來(lái)就到人們清潔我的時(shí)候了。 ? The teacher told us light travels faster than sound. 老師告訴我們光比聲音傳播得快。 ? The radio is very loud. Can you turn it down a little, please? 收音機(jī)聲音太大,你能調(diào)小一點(diǎn)嗎? 辨析: voice, noise與 sound voice 指因聲帶振 動(dòng)發(fā)出的“ 說(shuō) 話(huà)聲;嗓音 ” noise 指聽(tīng)起來(lái)令 人不舒服的 “ 噪音 ” sound 指自然界的 一切 “ 聲音 ” ? Please keep your voice down. 請(qǐng)說(shuō)話(huà)小聲些。 turn off 關(guān)掉 turn on 打開(kāi) turn down 關(guān)小 turn