20xx秋上海教育版英语六年级上册module4unit12theearthperiod3ppt课件内容摘要：
paper. They bring their own shopping bags and stop using plastic bags. 2 What do people do to keep the Earth clean and healthy? Answer the questions. 1 Why does the Earth get sick? We live on the Earth. The Earth is a beautiful place. There are rivers, oceans, land and forests. There are many different plants and animals too. People, plants and animals need clean water and air. Sometimes people throw rubbish into rivers and oceans. Sometimes people cut down too many trees. Smoke from cars and factories makes the air dirty. The Earth gets sick.。阅读剩余 0%
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