(B)
Every spring, thousands of fish swim through Utrecht, a city in the Netherlands, to find a place to lay their eggs. In this process, they help eat insects and keep the waterways clean. However, there is one problem. They have to wait at the Weerdsluis lock(闸), which is usually closed at this time of year.
After knowing that, local ecologist Mark van Heukelum decided to help the fish. He learned that the lock keeper didn't know when there were fish waiting at the lock. Mark set up an underwater camera at the lock and connected it to a computer and an online doorbell. When someone sees fish waiting to pass, they press the doorbell and the lock keeper will open the lock to let the fish through.
But Mark couldn't keep watching the doorbell day and night. He reached out to the public to see how many people would like to lend a hand. He was surprised. In its first spring in 2021, the Fish Doorbell was rung more than 100,000 times by people all around the world.
This spring, people's interest didn't seem to wane. On the website, the number of visitors was always over 100 and could go as high as 500, depending on the time of day. Politely holding a door open for the friends of humans in the water is a feel-good act of kindness.
Some people are thinking of ways to automate(使自动化) the doorbell. But Mark takes a different view. "I hope when spring comes, people will be excited to ring the doorbell again."
根据短文内容,选择正确答案。
()1. What challenge are the fish in Utrecht facing?
A. They have no place to lay eggs.
B. They can't find enough food.
C. A lock gets in their way.
()2. Paragraph 2 doesn't tell us .
A. who came up with the Fish Doorbell idea
B. when Mark talked to the lock keeper
C. how the Fish Doorbell works
()3. The underlined word "wane" in paragraph 4 means "".
A. start B. continue C. get weaker
()4. What can we learn from the Fish Doorbell project?
A. Many hands make light work. B. Well begun is half done.
C. Fact speaks louder than words.
()5. Which is the best title for the passage?
A. Join an Online Project to Watch Fish in Spring.
B. Robot Changes the Life of Fish in the Netherlands.
C. Ring the Doorbell to Help Fish in Utrecht.

1. C
2. B
3. C
4. A
5. C

这是一篇对应主题为乌得勒支“鱼门铃”助力鱼类通行的阅读理解题，结合配套原文内容逐一分析：
1. 第一题：乌得勒支的鱼类洄游路线被水闸阻挡，这是它们面临的核心挑战，A选项“没有产卵的地方”、B选项“找不到足够食物”均不符合原文表述，因此选C。
2. 第二题：第二段介绍了“鱼门铃”的提出者、运作方式，没有提及Mark和水闸管理员交谈的具体时间，因此选B。
3. 第三题：结合上下文语境，wane此处描述相关状态逐渐减弱，和“get weaker（变得更弱）”含义匹配，start（开始）、continue（继续）均不符合语境，因此选C。
4. 第四题：该保护鱼类的项目有大量志愿者共同参与协作完成，对应谚语“Many hands make light work（人多好办事/众人拾柴火焰高）”，B选项“善始者事半功倍”、C选项“事实胜于雄辩”都不符合项目传递的内涵，因此选A。
5. 第五题：全文核心围绕乌得勒支的“鱼门铃”装置帮助鱼类顺利通行展开，C选项最贴合全文主旨，A选项“加入线上项目春季观鱼”、B选项“机器人改变荷兰鱼类生活”都和原文核心内容不符，因此选C。