----- Nội dung dịch tự động từ ảnh ----- 14. A dripping faucet A. can waste B. is wasted 500 liters of water a month. C. waste D. are wasting 15. He sighed A. sadly 16. Please when he heard the news. B. sad C. sadden D. sadness the lights. It's very dark. B. go on C. get on started to tell the story. A. turn on D. put on 17. The man sat down on the chair A. so B. and C. or D. because by motorbike to save energy. C. however _with what you're doing. Don't look at them! C. away 18. You should travel by bike A. therefore B. instead of D. because 19. Please go A. on 20. The new appliance does not only work B. out D. down but also saves energy.