四、提升题请写一篇短文，介绍你最喜欢的星球，让同学们了解这颗星球的奥秘。至少介绍4条关于这颗星球的事实，不少于50词。

Earth is a beautiful planet. It looks like a big blue marble, because it has lots of oceans. It travels around the Sun. The sky is often blue. We can see the Sun and clouds in the daytime. We can also see birds and planes. At night, we can see the Moon and many bright stars. Earth also has some beautiful names, for example, the Blue Planet and Mother Earth. It's our home. We should take good care of it.

【分析】本题要求撰写介绍最喜欢星球的短文，需满足两个核心要求：至少4条星球相关事实、字数不少于50词。解题思路为：1. 选取熟悉且易展开的星球（如地球）；2. 梳理该星球的4条及以上事实（如外观特征、运行特点、别称、作为家园的意义等）；3. 组织连贯的英语语句，确保覆盖要求的事实数量和词数，最后可加入情感升华（如呼吁保护星球）。
【解析】首先确定介绍的星球为地球，依次介绍其外观（像蓝色大理石，因拥有大量海洋）、运行特点（绕太阳公转）、别称（蓝色星球、地球母亲）、作为人类家园的属性，最后点明应保护地球，内容符合至少4条事实、不少于50词的要求。
【答案】Earth is a beautiful planet. It looks like a big blue marble, because it has lots of oceans. It travels around the Sun. The sky is often blue. We can see the Sun and clouds in the daytime. We can also see birds and planes. At night, we can see the Moon and many bright stars. Earth also has some beautiful names, for example, the Blue Planet and Mother Earth. It's our home. We should take good care of it.
【知识点】英语短文写作、星球科普知识
【点评】本题将英语写作与天文科普结合，既考查学生的英语表达能力，又引导学生了解星球常识，内容贴近生活，易于学生完成。
【难度系数】0.6