Question

今天的火星是地球的前车之鉴，请根据以下要点写一篇短文，内容要点如下：
绝大多数科学家相信在火星上条件非常艰巨，没有生命;
但也有些科学家证明火星上曾经有过水和生命；
地球正在变得越来越来拥挤，污染越来越严重；
如此下去，地球将不适合人类居住了；
我们应该……（保护地球的做法）
注意：
1、短文要连贯通顺，语法正确，不要逐字翻译；
2、第5点用一、两句话展开合理的想象；
3、词数80左右。
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Answer 1

Most scientists believe that the conditions on Mars are very tough and there’s non life on it. But some scientists have proved that there was once water and life on Mars. Now the earth is becoming more and more crowded. The pollution is getting worse and worse. If this continue, the earth will not be suitable for humans to live. We should do something to prevent the earth becoming a second Mars. We can plant more trees and flowers to protect our environment.

试题分析：这是一篇材料作文。本文所给材料比较详细，我们要做的就是用正确的英语把这些内容表达出来。动笔前要仔细考虑，不可遗漏要点，也可适当发挥。根据材料内容可知，本文要使用现在完成时、现在进现实、一把把将来时、一般现在时等时态，主语是第一人称。在提出建议时可以使用情态动词should等。
【亮点说明】本文多次使用主从复合句，为文章增色不少。如：But some scientists have proved that there was once water and life on Mars. Now the earth is becoming more and more crowded.还用了一些连词如if，but等。