Period 1AListen and circle1There is not much coal on Earth.2We should not use too many plastic bags or bottles.3Su Yang uses water to brush her teeth.4Trees help keep the air clean. We should plant more trees.5We can use glass bottles.6Mr Green doesn’t go to work by car. He goes to work by bike.(1 b2 a3 a4 b5 b6 b)BRead and write 1 water, clean2 coal, oil3 Cars

Period 1AListen and circle1There is not much coal on Earth.2We should not use too many plastic bags or bottles.3Su Yang uses water to brush her teeth.4Trees help keep the air clean. We should plant more trees.5We can use glass bottles.6Mr Green doesn’t go to work by car. He goes to work by bike.(1 b2 a3 a4 b5 b6 b)BRead and write 1 water, clean2 coal, oil3 Cars