.12-13学年第一学期八年级英语复习学案（任务型）AWhat do you think of the most important inventions in the world? The TV? The printing? The telephone? Or the computer? A report shows that they are not the only important inventions. Here are three other important inventions.One of the simplest inventions is the toilet. Before toilets, waste ran into rivers from peoples houses. Illnesses were common in big cities, and it was often difficult to find clean drinking water.Animal food is another important invent
