1) People ____ recycle to reduce pollution. a) A) can b) B) should c) C) would d) D) mustn't 2) We ____ use plastic bags to protect the environment. a) A) can b) B) should c) C) would d) D) mustn't 3) You ____ leave the lights on when you leave the room. a) A) can b) B) should c) C) would d) D) mustn't 4) People ____ plant more trees to help the planet. a) A) can b) B) should c) C) would d) D) mustn't 5) We ____ waste water by taking long showers. a) A) can b) B) should c) C) would d) D) mustn't 6) Industries ____ reduce emissions to combat climate change. a) A) can b) B) should c) C) would d) D) mustn't 7) People ____ throw trash in the rivers. a) A) can b) B) should c) C) would d) D) mustn't 8) We ____ use public transportation instead of cars. a) A) can b) B) should c) C) would d) D) mustn't 9) Children ____ learn about recycling at school. a) A) can b) B) should c) C) would d) D) mustn't 10) You ____ cut down trees without a plan. a) A) can b) B) should c) C) would d) D) mustn't 11) We ____ protect endangered species. a) A) can b) B) should c) C) would d) D) mustn't 12) People ____ ignore the effects of pollution. a) A) can b) B) should c) C) would d) D) mustn't 13) We ____ use renewable energy sources. a) A) can b) B) should c) C) would d) D) mustn't 14) You ____ waste paper by throwing it away. a) A) can b) B) should c) C) would d) D) mustn't 15) People ____ be more aware of environmental issues. a) A) can b) B) should c) C) would d) D) mustn't

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