https://online2.tingclass.net/lesson/shi0529/0009/9907/78.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
keep it down 小點(diǎn)聲，保持安靜
Keep it down, the kids are sleeping.
小聲點(diǎn)，孩子們睡了。
Could you keep it down, please? I am doing my homework.
請(qǐng)小聲點(diǎn)，好嗎?我在寫作業(yè)呢。
瘋狂練習(xí)吧!
