Ⅳ. Think and say.
Talk about one of the small but useful inventions that changed the world.
● Who was the inventor?
● When was it invented?
● How did it change the world?

One possible version:
I want to talk about the light bulb. It was invented by Thomas Edison in 1879. Before the light bulb, candles or oil lamps were used to help people see at night. They were not very bright and sometimes started fires. The light bulb changed the world because it gave us a safe and bright way to light up our homes. Now we can work, study, and play even after the sun goes down.

【分析】
首先明确题目要求：谈论一个“小但有用且改变世界”的发明，需涵盖三个要点：发明者、发明时间、该发明对世界的改变。解题思路为：1. 选择大众熟知的典型发明（如灯泡）；2. 对应三个要点梳理准确信息；3. 用通顺的英语组织成连贯的口语内容，确保覆盖所有要求的要点。
【解析】
选择灯泡作为谈论对象，依次回应三个问题：①发明者是托马斯·爱迪生；②发明时间为1879年；③改变世界的方式：此前人们用蜡烛或油灯照明，亮度低且易引发火灾，灯泡提供了安全明亮的照明，让人们在夜间也能工作、学习、娱乐，极大改变了生活方式。
【答案】
One possible version:
I want to talk about the light bulb. It was invented by Thomas Edison in 1879. Before the light bulb, candles or oil lamps were used to help people see at night. They were not very bright and sometimes started fires. The light bulb changed the world because it gave us a safe and bright way to light up our homes. Now we can work, study, and play even after the sun goes down.
【知识点】
英语口头表达、发明相关英文表述
【点评】
本题为开放性口语任务，考查学生的英语组织表达能力，同时引导学生关注发明对生活的影响，难度适中，学生结合常识即可完成。
【难度系数】
0.6