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Lesson 45 关键句型一：表示构成危害的句型(以题为例) 1. Pollution has become a serious problem to all the nations of the world. 2. Pollution has become a great risk to our earth. 3. Pollution is a danger to us all. 4. Pollution is a threat to mankind. 5. Pollution has threatened our lives greatly. 6. Pollution has brought great to human beings. 7. Pollution troubles / vexes / irritates us no end. 【vex v. 使烦恼 irritate v. 激怒;使恼恨】 关键句型二：表示采取措施的句型(以本题为例) 1. Something must be done to tackle the problem. 2. Weve got to do something about pollution right away. 3. We must take action now to control pollution. 4. We have to take effective measures to solve this problem. 5. We should adopt some measures to fight against pollution. 6. Its time to take steps to control the increasingly serious pollution. | 
