1) Pollution _________ harms marine life. (70%) a) rarely b) never c) sometimes d) often 2) People ________ recycle. (50%) a) always b) sometimes c) usually d) seldom 3) Factories ________ pollutes the air. (90%) a) occasionally b) generally c) usually d) always 4) People _____ clean the rivers. (5%) a) rarely b) never c) often d) occasionally 5) Air pollution _______ causes respiratory problems. (80%) a) never b) occasionally c) generally d) sometimes 6) Water pollution _________ put in danger the fishes. (90%) a) seldom b) usually c) rarely d) occasionally 7) Global warming _________raises the sea. (80%) a) generally b) never c) seldom d) sometimes 8) Plastic is ________ found in oceans. (70%) a) always b) often c) rarely d) usually 9) Companies _______ use eco-friendly tactics. (15%) a) always b) usually c) rarely d) seldom 10) People ________ participate in beach clean-up events. (30%) a) sometimes b) generally c) occasionally d) never

Exercises

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