人教版(新教材)高中英语选修2Unit 1　Science and Scientists课时作业4：Reading and Thinking—Language Points

Reading and Thinking-Language Points提示：题干中加底纹的词汇是本课时的词汇复现，帮助学生及时巩固，循环复习。【基础巩固】I .单词拼写I have already