作者：成天宇; 邱晶晶(指导)earthbybike
摘要：Look! This is our home, the Earth. We all live on it. It is blue and green. Earth Day is on 22nd April. We should lead a low-carbon (低碳) lifestyle to protect our Earth. There is not much water in many places. We should reuse and save water. There is not much coal or oil on Earth. We should tell our parents to go out by bus or by bike.
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