Trees can make the Earth clean and green. Trees are good for people and animals. Tomorrow will be Tree Planting Day. Mike is going to plant trees, but he doesn’t know how to do. So he asks his father for help. Then he knows. First, he should dig a hole(挖洞). Then he should put a plant in the hole. After that, he should water it every day. One day, it will become a big tree.
1．根据短文内容，给下列图片排序。
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