* Fill in each blank with one suitable word or phrase.
(1) …………………more and more countries become (2) …………………, there will be more and more competition for petroleum for cars, home heating, and industry. While (3) …………………petroleum contributes greatly (4) …………………acid rain, it is less (5) ………………than coal. Unfortunately,
petroleum is more expensive than coal and the supply of petroleum will eventually (6) …………………out. Therefore, there will be more and more pressure to burn coal for energy. Coal is a (7)…………………dirtier energy source than petroleum. Since we already know (8) ………………destructive
acid rain is, it is very important that we increase our efforts to find a (9) …………………polluting source of energy as quickly as possible (10) …………………we can avoid further environment damage.
*************************
1. A. Although B. Even C. As D. Also
2. A. industry B. industrial C. industrialize D. industrialized
3. A. burning B. flowing C. blowing D. releasing
4. A. to B. on C. for D. with
5. A. pollute B. polluting C. pollution D. polluted
6. A. use B. eat C. run D. make
7. A. more B. much C. many D. most
8. A. what B. that C. which D. how
9. A. not B. no C. nor D. non
10. A. so that B. but C. if D. because
