We ____ keep the streets clean. We ____ plant trees. 5. We ____ destroy the forests. They are lungs of the Earth. 7. We ____ protect wild animals because they are important for the balance of the nature. 9. We ____ prefer plastic products. We ____ waste energy. we ____ respect the environment we ____ use solar and wind energy because they are renewable and they do not pollute the air Everybody ____ use public transportation because private cars pollute the air. You ____ wear a seatbelt when you drive. You ____ use your phone while driving. You ____ walk on the floor with your dirty shoes. I ____ go to the supermarket today for birthday party. You ____ smoke indoor places. ____ they leave it early? ____ you be in school?

should must exercise

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