Mời các em cùng tham khảo Đề KTCL ôn thi THPT Quốc gia năm 2017 môn tiếng Anh - THPT Liễn Sơn - Đề số 50 nhằm giúp các bạn học sinh lớp 12 có thêm nhiều đề luyện tập, củng cố kiến thức, chuẩn bị sẵn sàng cho kỳ thi THPT quốc gia năm 2017 sắp diễn ra. | Gradually people learned they could start a fire without traveling far to find flames. They rubbed two pieces of wood together. This method was used for thousands of years. When people became used to making fires with which to cook food and stay warm at night, they found that certain resins or gums from trees burnt longer and brighter. They melted resins and dipped branches in the liquid to make torches that lit their homes at night. Iron stands in which torches used to be fixed can still be seen in old buildings of Europe. There was no lighting in city streets until gas lamps, and then electric lamps were installed. Boys ran about London at night carrying torches of burning material. They were called torch boys, or link boys, and earned a living by guiding visitors to friends’ houses at night. For centuries homes were lit by candles until oil was found. Even then, oil lamps were no more effective than a cluster of candles. We read about the splendors and marvels of ancient palaces and castles, but we forget that they must have been gloomy and murky places at night.
