I/ Choose the best answer: 1. The polluted water ( leads/ causes/ results ) the death of the fish. 2. Water from power stations may ( cause/ make/ lead to ) water in the rivers and lakes hotter. 3. ( Because/ Because of/ Although ) the loud noise, she couldn’t sleep. 4. Factories ( don’t dump/ won’t dump/ will dump ) waste into rivers if the government fines them heavily. 5. If she ( doesn’t/ didn’t/ wouldn’t ) work in a noisy office, she wouldn’t have a headache after work every day. 6. Researchers haven’t found what has led ( ( in/ to/ of ) the pollution of water. 7. Too much use of electric lights in cities may cause ( noise pollution/ light pollution/ air pollution). 8. He worked in a noisy environment for a long time, ( because/ although/ so ) his hearing became worse. 9. She went to school ( although/ because / because of ) she was ill. 10. ( Water pollution/ Radioactive pollution/ Air pollution ) occurs when the atmosphere contains gases, dust, or fumes in harmful amounts.