Unit 21. more valuable than gold比金子还珍贵2. the amount of water水量3. in the bathroom 在浴室里4. brush ones teeth刷牙5. be on开着, 在上映6. The tap is on.水龙头开着。7. sth. pour into the sink某物流入水槽8. sth. vanish down the drain某物流入下水道消失9. turn the tap off=turn off the tap关掉水龙头10. say loudly大声地说11. look around环顾12. waste water浪费水13. finish with 完成, 结束14. sound impatient听起来不耐烦15. Its adj. for sb. to do sth.对于某人做某事是怎么样的16. float comfortably in a cloud舒服地飘在云中17. enj
