【单选题】Part IV Reading Polluting the planet Burning fossil fuel is perhaps the greatest cause of pollution. But it is also the main way to make energy. The cheapest way to make electricity is with power plan...
It is a great cause and a great means of energy.
It causes pollution but it is a great source of energy.
It causes pollution and electricity.
It causes coal to be transported to a power plant.
【单选题】IX. Reading comprehension: (24分) A. Choose the best answer: (6分) ★ Most great inventors often met with much trouble in their work. Before they could succeed, they had to overcome thousands of difficul...
the life of George Stephenson
the invention of the train
the trouble George Stephenson met in his invention
the use of the engine on the train