四、语法填空
根据短文内容，填写所缺单词或用括号中所给单词的正确形式填空，使短文意思完整。
I will never forget the day 1. I saw my first whale. It was a summer morning, and I was on a boat with my grandfather. He is a scientist 2. studies marine life. “Keep watching,” he said 3. (soft). “You never know 4. might appear.”
For hours, I saw nothing. I was 5. (hard) patient. But my grandfather told me 6. patience is the most important skill for a naturalist.
Then, suddenly, the water moved. A huge whale rose from the ocean. It was 7. (amaze) beautiful. I stood there, speechless. I knew that I was seeing something special.
My grandfather explained 8. whales travel thousands of kilometres every year. He said that understanding their migration helps us protect them. That day, I learned that nature is not something far away. It is right here, and it is our job to protect it.
Now, I volunteer at a marine protection centre. I help clean the beach and tell visitors 9. they keep the ocean clean. I often think about what my grandfather taught me that day: the best way 10. (protect) nature is to first fall in love with it.

1. when 2. who/that 3. softly 4. what 5. hardly 6. that 7. amazingly 8. that 9. how 10. to protect

1. 此处先行词是表示时间的the day，定语从句"I saw my first whale"结构完整，用关系副词when引导定语从句，在从句中作时间状语。
2. 此处先行词是指代人的scientist，定语从句缺少主语，用关系代词who/that引导定语从句。
3. 此处修饰动词said，需要使用副词形式，形容词soft的副词形式是softly，意为“轻柔地”。
4. 此处作动词know的宾语，是宾语从句，从句缺指代事物的主语，结合句意“你永远不知道什么会出现”，填连接代词what。
5. 根据前文“好几个小时我什么都没看到”的语境，此处表达“我几乎没有耐心了”，hard的副词hardly意为“几乎不”，符合语义。
6. 此处是tell me后的宾语从句，从句是结构完整的陈述句，用无实义的连接词that引导宾语从句。
7. 此处修饰形容词beautiful，需要用副词作状语，amaze的副词形式amazingly意为“惊人地、非常”。
8. 此处是explained后的宾语从句，从句是陈述客观事实的完整句子，用连接词that引导宾语从句。
9. 结合志愿者的工作场景，此处表达“告诉游客如何保持海洋清洁”，用连接副词how引导宾语从句，符合语境。
10. 固定搭配the best way to do sth. 意为“做某事的最好方式”，因此填不定式结构to protect。

五、阅读表达
In a small town in the west of China, a group of students started a project called “Water Watch”. They wanted to find out whether the local river was clean. Every week, they went to the river to collect water samples. They used magnifiers to look for tiny living things in the water.
“We learned that the presence of certain insects tells us whether the water is healthy,” said Li Wei, one of the students. “If we find mayflies(蜉蝣), it means
the water is clean. If we find only worms, it means there is pollution.”
The students shared their findings with the local government. Amazingly, their work helped stop a factory from polluting the river. Now, the river is clean again, and fish have returned.
“I believe that young people can make a difference,” said their teacher. “They showed us that science is not just in books. It is in the world around us.”
根据短文内容,补全句子。
1. The students started a project called “ Watch”.
2. They used to look for tiny living things in the water.
3. The presence of certain tells whether the water is healthy.
4. The students’ work helped stop a from polluting the river.
5. The teacher believes that young people can make a .

【解析】：本题可通过在原文中定位对应内容直接得出答案：
1. 定位文章第一段第一句"In a small town in the west of China, a group of students started a project called 'Water Watch'"，可直接找到项目名称的对应内容。
2. 定位文章第一段最后一句"They used magnifiers to look for tiny living things in the water"，可直接找到实验所用工具的对应内容。
3. 定位文章第二段第一句"We learned that the presence of certain insects tells us whether the water is healthy"，可直接找到判断水质健康的参照生物的对应内容。
4. 定位文章第三段第二句"Amazingly, their work helped stop a factory from polluting the river"，可直接找到被阻止排污的主体的对应内容。
5. 定位文章最后一段第一句"'I believe that young people can make a difference,' said their teacher"，此处是固定搭配make a difference，意为"产生影响、发挥作用"，可直接找到对应内容。
【答案】：1. Water
2. magnifiers
3. insects
4. factory
5. difference