C
根据短文内容，从题中所给的 A、B、C、D四个选项中选出一个最佳选项。
Everyone has some precious memories in their life. One of my most precious memories is the school trip to the mountain last year.
It was a sunny day in spring. All the students in my class took a bus to the mountain. We were very excited. When we arrived at the mountain, we saw beautiful flowers and green trees everywhere. The air was fresh and the birds were singing. We started to climb together. On the way, we talked, laughed, and helped each other when someone got tired.
After climbing for an hour, we reached the top. The view was amazing—we could see the whole city below us. We took many photos there. Then we had a picnic on the top, sharing our food and drinks. Everyone was happy.
In the afternoon, we played some games and sang songs together. When it was time to leave, we felt a little sad, but also very happy. This trip not only helped us relax, but also made our class more united.
I will never forget this trip. It is a precious memory in my life. Every time I think of it, I feel warm and happy. I will keep this memory in my mind forever.
21. What is the writer's precious memory? ()
A. A family trip to the mountain.
B. A school trip to the mountain.
C. A birthday party with classmates.
D. A picnic with friends.
22. What was the weather like that day? ()
A. Rainy and cold.
B. Cloudy and windy.
C. Sunny and warm.
D. Snowy and freezing.
23. How did the students go to the mountain? ()
A. By bike.
B. By bus.
C. On foot.
D. By car.
24. What did the students do after reaching the top of the mountain? ()
A. They helped each other climb down.
B. They played games first, and then had a rest.
C. They took photos and had a picnic.
D. They sang songs and danced.
25. What did the writer learn from the trip? ()
A. The mountain was very beautiful.
B. It's important to help each other.
C. The trip made the class more united.
D. Picnic is a good activity.

21.B 22.C 23.B 24.C 25.C

【分析】
本题为英语阅读理解细节题，解题思路为：先通读短文掌握大意，再针对每个问题，带着关键词回到原文定位相关语句，将原文信息与选项逐一对比，排除错误选项，选出最佳答案。所有题目答案均可在原文中找到明确依据，无需复杂推理。
【解析】
21题：定位原文第一段“One of my most precious memories is the school trip to the mountain last year.”，可知作者珍贵的记忆是学校组织的登山旅行，对应选项B。
22题：定位原文第二段“It was a sunny day in spring.”，结合春天的特点，可知当天天气晴朗温暖，对应选项C。
23题：定位原文第二段“All the students in my class took a bus to the mountain.”，可知学生们乘坐公交车前往，对应选项B。
24题：定位原文第三段“We took many photos there. Then we had a picnic on the top...”，可知到达山顶后他们先拍照再野餐，对应选项C。
25题：定位原文第四段最后一句“This trip not only helped us relax, but also made our class more united.”，可知作者从旅行中收获班级更团结，对应选项C。
【答案】
21.B 22.C 23.B 24.C 25.C
【知识点】
英语阅读理解、细节理解题
【点评】
本题为基础英语阅读理解题，全部考查细节信息定位，学生只需根据问题关键词匹配原文即可得出答案，难度较低，适合巩固英语阅读基础。
【难度系数】
0.8