必修3 Unit 4 Astronomy 2021届高三人教版英语基础练习题（七步走）

B3U4 Astronomy: the science of the stars 满分：120分 得分：__________ 第一步：单词拼写 （根据汉语提示，写出该单词的正确形式。每小题1分，满分20分） 1. __________ (天文学) is the scientific study of the stars, planets, and other natural objects in space. 2. In order to protect the environment, people should make the best of __________ (太阳的) energy. 3. We’ve got a good __________ (系统) for dealing with complaints from customers. 4. A __________ (理论) is an idea or set of ideas that is intended to explain something about life or the world, especially an idea that has not yet been proved to be true. 5. An __________ (原子) is the smallest amount of a substance that can take part in a chemical reaction. 6. __________ (碳) is a chemical element that diamonds and coal are made up of. 7. The top leaders of the two countries are holding talks in a friendly __________ (气氛). 8. We have to solve the __________ (根本的) cause of the problem. 9. A __________ (锁链) is a series of metal rings which are joined together in a line and used for fastening