Unit4知识点-D部分练习 2025-2026学年沪外教版七年级英语下册

七年级英语下册Unit4知识点-D部分练习 小试牛刀 A. 选用方框中的短语填空（每个限用一次） | transport goods | stop floods | go up and down | check understanding | support the weight | 1. People built the Grand Canal to __________ across the country. 2. A lock helps boats __________. 3. We need to make sure the bridge can __________ of heavy trucks. 4. In a conversation, you can say “Do you mean …?” to __________. 5. Dams are built to __________ and provide water. B. 句型转换（改为一般疑问句并作肯定或否定回答） 1. People built the Grand Canal to transport goods. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 2. A lock helps a boat move up and down. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 3. You need to make sure the bridge is strong enough. 一般疑问句：________________________________________________ 肯定回答：________________ 否定回答：________________ 配套练习 A. 单项选择（★） 从A、B、C、D中选择最佳答案。 1. What is the main purpose of the Grand Canal? A. To help boats go up and down. B. To transport goods across the country. C. To stop floods. D. To provide drinking water. 2. What does a lock do? A. It stops boats from moving. B. It helps boats go up and down hills. C. It cleans the water. D. It connects two rivers. 3. When you want to check if you understand someone correctly, you can say ______. A. “Do you mean …?” B. “I don’t know.” C. “That’s wrong.” D. “Say it again.” 4. Which of the following is NOT a step in operating a lock? A. Open the gates and let the boat in. B. Close the gates and fill the lock with water. C. Let the boat sail directly over the hill. D. Open the top gates and let the boat go on. 5. Why do people like the Grand Canal now? A. Because it is still used for transport. B. Because it is a popular tourist attraction. C. Because it helps stop floods. D. Both A and B. B. 完成句子（★★） 根据课本内容和对话，用正确的词汇完成句子。 1. 人们建造大运河是为了在全国范围内运输货物。 People built the Grand Canal to __________ __________ across the country. 2. 船闸帮助船只上下移动。 A lock helps boats go __________ and __________. 3. 我们需要确保桥梁能承受重型卡车的重量。 We need to make sure that the bridge can __________ the weight of heavy trucks. 4. 你的意思是我们需要确保桥梁能承受很大的重量？ Do you __________ we need to make sure the bridge can stand much weight? 5. 正是这样。我们不想看到桥梁在重型卡车下坍塌。 __________. We don’t want to see the bridge break down under the weight of heavy trucks. 拓展思考 Part 1（用 first, second, next, finally 描述船闸如何帮助船只上坡） 写一段话（至少4个步骤）。 使用以下表达：First, ..., Second, ..., Next, ..., Finally, ... __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 2（给同学写一段话，解释为什么大运河是一个伟大的工程） 写一段话（至少5句）。 使用以下表达：The Grand Canal is a great engineering project because, it was built, it helped, now it is, I think __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Part 3（在对话中，为什么确认理解很重要？） 写一段话（至少5句）。 使用以下表达：Checking understanding is important because, it helps, without it, people may, for example, saying “Do you mean…” can, I believe __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 参考答案与解析 小试牛刀 A 1. transport goods 2. go up and down 3. support the weight 4. check understanding 5. stop floods 小试牛刀 B 1. Did people build the Grand Canal to transport goods? Yes, they did. / No, they didn’t. 2. Does a lock help a boat move up and down? Yes, it does. / No, it doesn’t. 3. Do you need to make sure the bridge is strong enough? Yes, I do. / No, I don’t. 配套练习 A 1. B 2. B 3. A 4. C 5. D 配套练习 B 1. transport goods 2. up, down 3. support 4. mean 5. Exactly 拓展思考（示例） Part 1 First, open the lower gates and let the boat into the lock. Second, close the gates and open the paddles to let water into the lock. Next, the water level rises and lifts the boat. Finally, open the upper gates and let the boat go on. Part 2 The Grand Canal is a great engineering project because it was built over a thousand years ago without modern machines. It helped transport goods across China and connected different regions. Now it is also a popular tourist attraction. I think it shows the wisdom and hard work of ancient Chinese engineers. Part 3 Checking understanding is important because it helps avoid mistakes in communication. Without it, people may misunderstand each other and cause problems. For example, saying “Do you mean…” can make sure you understand correctly. I believe checking understanding is a key skill in teamwork and daily conversations. 1 学科网（北京）股份有限公司 $