Every day, in homes all over the world , people waste huge (15)……………. of energy and water. Hong Kong is estimated to waste about $5 billion worth of energy a year. This is due to their bad habits. For example, leaving lights, air-conditioners and televisions on when no one is in the room (16)……….. for wasteful energy consumption. Using too much water, or not (17) ……. dripping taps, also contributes to the problem. Most people do not realize (18)………. saving energy in the home will actually save them money. If people use (19)…………. energy, gas and electricity bills will become lower. Most of the ways we can use to decrease energy consumption in the home are very simple. The most obvious one is (20)………. household appliances when they are not in use. 15. A. numbers B. sums C. amounts D. qualities 16. A. explains B.accounts C. provides D. cares 17. A. closing B. reducing C. fixing D. breaking 18. A .this B. there C. whether D. that 19. A. lower B. fewer C. more D. less 20. A. turn off B. turn on C. look for D. look after