1.Read the following pasage and then choose the best option to fill in each gap. (1.0point) Much of our waste, especially waste and smoke (1) from.......... electric-powered stations, the chemical industry and heavy industry, is very dangerous (2)......... die in the lakes, rivers and seas; forest trees die, too. Much of this dangerous waste goes into the (3)...... by the wind. The Earth is our home. We should take care of it, for ourselves, and for our children and grandchildren. This means we have to keep our (4)........... green and clean. The importance of this task is pinned out by ecologists- thể scientists should study the relations between living things and the environment. However, each of us must đó everything to keep the land, air water clean. 1.a.houses. B.schools. C.factories. D.restaurant. 2.a.plant. B.fish. C.soil. D.Tree 3.a.air. B.river. C.soil. d.water. 4. A. House. B. Street. C. Environment. D. Air.