Задать все типы вопросов к предложению: technology has been with humans from the first use of a stone.

1. has  technology  been with humans from the first use of a stone? - общий2. has technology been with humans or with monkeys from the first use of a stone? - альтернативный3. since when has  technology been with humans? - специальный4.  technology has been with humans from the first use of a stone, hasn't it? - разделительный5. what has been with humans from the first use of a stone? - к подлежащему

1.when the air is very dirty we usually say it is b) polluted 2.the thing which pollutes the air and soil is b) pollutant 3. we should protect a) the environment 4. ecological problems can be a) solved by people 5. a person who doesn't eat meat is b) a vegetarian 6.if you protect the environment you b) an environmentalist 7.if we want to reuse things or materials we a) recycle them 8.if you love nature you b) a green person 9.garbage than can be easily burned b) combustible 10. garbage that can't be burned c) noncombustible

1. The invention of the railroads began with the invention of the steam engine, the idea of which originated many years earlier. James Watt's improvement on the Newcomen's engine allowed the steam engine not only go up and down, but to turn gearwheels. 2. In 1781 Watt designed and produced a rotary-motion steam engine.   This new engine could be applied to many different types of machinery. 3. In 1804 Richard Trevithick, an English engineer invented a steam locomotive, and his   invention brought together the idea of iron rails and the steam engine. 4. In 1882 Edison installed the first durable electric lights in his own labs, and later  built the first public power station. However, Edison's DC current system had only a three-mile range.