Đề thi học kỳ 2 môn Tiếng Anh lớp 9 trường THCS Trương Định, Ninh Thuận năm 2014

Lighting - luxuries - reduced - last - effectively - consumers

In Western countries, electricity, gas and water are not (1)................ and necessaries. Companies now realize that (2)................ want products that will not only work (3) ..............., but also save money.

For most North American households, (4)........................ accounts for 10 percent to 15 percent of electricity bill. However, this amount can be (5).................. by replacing an ordinary 100 watt light bulbs with an energy-saving bulb. These bulbs use a quarter of the electricity of standard bulbs and (6).............. eight times larger. Therefore consumers can save about USD 7 to USD 21 per bulbs.