提示词： protect, make, environment, clean, so
要求：1. 使用全部提示词，并在语段中用下划波浪线“~~~~”标出提示词；
2. 语段具有一个相对合理的主题意义；
3. 词数为50词左右，最多不超过80词。Once upon a time, the earth was very beautiful and full of energy resources. But now, the environment in the world has pletely changed. The rivers are not clean. Many trees are cut down. More and more animals are facing danger. As we all know, the earth is the mother of human beings. So it’s important for all of us to protect the world. It’s our duty to make humans and nature be in harmony.
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(答案→)Once upon a time, the earth was very beautiful and full of energy resources. But now, the environment in the world has pletely changed. The rivers are not clean. Many trees are cut down. More and more animals are facing danger. As we all know, the earth is the mother of human beings. So it’s important for all of us to protect the world. It’s our duty to make humans and nature be in harmony.
解析：本题所给材料为几个单词,要求根据这些内容写一段合理的语段，动笔前先要根据这些单词组织材料,确定在主要写作内容,确定时态主要词汇等问题，注意时态与时间状语的搭配问题。写作中，应注意描述的全面性；语言的表述应该符合语法的结构，造句应该符合英语的表达习惯。另外，在描述时，应该注意人称的变化。