Ⅲ. 答案:1. among　2. But　3. recent　4. expressing　5. shows　6. each　7. game/match　8. spoken/said　9. course10. helpful

　　Ⅳ. 【参考范文】

　　Dear editor,

　　Environmental problems are becoming more and more serious all over the world. All kinds of pollution and the destruction of the environment could be seen everywhere in our daily life.

　　With the development of industry and agriculture, cars make great noises and give off poisonous gas. Because of population expansion and overdevelopment, resources have become less and less. Trees on the hills have been cut down, and waste water is being poured continuously into rivers and lakes. The whole ecological balance of the earth is changing. Massive destruction of environment has brought about negative effects on the ecosystem around the world and even become a great threat to man’s existence.

　　We must face the situation that exists and take immediate actions to solve our environmental problems together. We hope that all these measures will be effective and bring back a healthy environment so that we could live happily in a beautiful and harmonious world.

　　Yours truly,

　　Zhou Kai

　　【语篇随练】

　　1.反应; 回答, 答复

　　2.戏剧性地; 剧烈地

　　3.爆炸

　　4.昏倒; 昏厥

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