阅读下面材料，从方框中所给的A—E五个选项中选出正确选项（其中一项是多余选项），将其序号填入第20—23小题，并回答第24小题。
It was a sunny summer afternoon.
My dad asked me if I would help him with cutting the grass. I knew he enjoyed spending his free time outside the door and I liked to be with him.
20.
First, we found a lawn mower(割草机). 21. Finally, my dad put on his favourite baseball cap and a pair of sunglasses.
22. He cut most of the lawn as I watched. Then he brought the cutter and used it to shape the lawn.
23. After that, my dad asked me if I was ready to try the lawn mower myself.
I rode the lawn mower and cut the last part so well! When we all finished, Dad said, “You did a wonderful job.” Dad thought I was even better at cutting the lawn than him!

24. What made the father and son’s afternoon special? (Answer within 15 words)

20. A
21. B
22. C
23. E
24. Cutting grass together happily.（答案不唯一，言之有理即可）

【分析】本题为英语语句还原题，需结合上下文的语境与动作逻辑逐一匹配选项：20题承接爸爸邀请帮忙割草的内容，21题对应使用割草机前的准备步骤，22题衔接爸爸割草的动作，23题匹配修草坪后的结果，24题需总结父子下午特别的原因。
【解析】
20题：上文爸爸提出让我帮忙割草，A选项“So I decided to give him a hand.”承接邀请，符合逻辑，故选A。
21题：上文提到找到割草机，B选项“Then we saw how much gas it had to make sure it could work well.”是使用割草机前的必要准备，符合动作顺序，故选B。
22题：下文讲爸爸割了大部分草坪，C选项“Later, we got the lawn mower to start, and my dad showed me how to cut the grass.”衔接爸爸割草的动作，符合语境，故选C。
23题：上文讲爸爸用割草机修草坪，E选项“It surely made the lawn look beautiful and tidy.”是修草坪后的结果，符合逻辑，故选E。
24题：结合全文，父子一起开心割草让下午变得特别，故答案为Cutting grass together happily.
【答案】
20. A；21. B；22. C；23. E；24. Cutting grass together happily.
【知识点】
英语语句还原；上下文逻辑推理；英语简短回答
【点评】
本题考查学生对语篇逻辑的理解与总结能力，语句还原需结合动作顺序和语境匹配选项，最后一题考查概括能力，整体难度适中。
【难度系数】
0.5