C
A day at the beach is always fun! While building sandcastles and playing in the sun are enjoyable, knowing how to stay safe in the water is very important. Beach flag systems (系统) are like helpful signs that tell us information about the sea.
Different coloured flags carry different meanings. A red flag means the water is not safe. There might be big waves or strong water that can pull you under. When you see this flag flying, you mustn’t go swimming as it puts your life in danger. A yellow flag says it is dangerous somewhere. The waves might be stronger than it looks, or the weather might be getting bad. If you notice this flag, you should be *cautious*. It’s better to stay close to families at all times and not to swim by yourself.
When you see two flags together, they mark special areas (区域) in the water. Black and white flags show this area is only for surfing (冲浪), so swimmers should stay away. This helps keep both swimmers and surfers safe.
So which flag shows where it is safe to swim? Look for the red over yellow flag. This flag marks a safe swimming area with lifeguards (救生员) watching. They are there to help if needed.
Remember to check the flags before you go in the water. By understanding and following these simple signs, we can all have fun at the beach while staying safe in the water.
()61. When a single red flag shows up, it means .
A. you can swim, but you must be careful
B. helpers are watching in that swimming area
C. the place is safe for both surfing and swimming
D. the water is dangerous, and you must not swim
()62. What does the underlined word “*cautious*” in Paragraph 2 mean?
A. Polite. B. Careful. C. kind. D. Brave.
()63. According to Paragraph 4, what should you do if you are in danger?
A. Look for the flag and swim there.
B. Put up a red over yellow flag.
C. Try to swim back quickly.
D. Ask the lifeguards for help.
()64. What is the main purpose of the last paragraph?
A. To show the meanings of different coloured beach flags.
B. To describe the different colours of the beach flags.
C. To tell us the importance of learning about the beach flags.
D. To give examples of dangerous water activities.
()65. What would be the best title for the passage?
A. Follow Beach Rules B. Swim with Lifeguards C. Colours Tell Danger D. Flags Teach Safety

61.D 62.B 63.D 64.C 65.D

【分析】
1. 第61题：首先定位到文章第二段关于单独红旗的描述，文中明确指出红旗代表水域不安全，必须禁止游泳，对比选项即可找到对应答案。
2. 第62题：需结合上下文推断词义，第二段提到黄旗代表某处有危险，后续给出“和家人待在一起、不独自游泳”的建议，由此可推断“cautious”表达的是“小心的”含义。
3. 第63题：根据题干定位到第四段，该段说明红黄旗区域有救生员值守，他们会在需要时提供帮助，因此遇到危险应向救生员求助。
4. 第64题：分析最后一段内容，该段提醒大家下水前查看旗帜，强调理解并遵循旗帜指示能保障海滩游玩安全，核心是传递了解海滩旗帜的重要性。
5. 第65题：梳理全文主旨，文章围绕海滩旗帜系统展开，介绍不同旗帜的含义，目的是教大家通过旗帜保障水上安全，据此选择最贴合主旨的标题。
【解析】
61. 定位文章第二段：“A red flag means the water is not safe...When you see this flag flying, you mustn’t go swimming as it puts your life in danger.” 可知单独红旗代表水域危险，禁止游泳，对应选项D。
62. 第二段提到黄旗代表存在潜在危险，后续建议“stay close to families at all times and not to swim by yourself”（时刻和家人待在一起，不要独自游泳），结合语境可推断“cautious”意为“小心的”，对应选项B。
63. 第四段指出：“This flag marks a safe swimming area with lifeguards watching. They are there to help if needed.” 说明救生员会在危险时提供帮助，因此遇到危险应向救生员求助，对应选项D。
64. 最后一段内容“Remember to check the flags before you go in the water. By understanding and following these simple signs, we can all have fun at the beach while staying safe in the water.” 强调了了解并遵循海滩旗帜指示的重要性，对应选项C。
65. 全文围绕海滩旗帜系统展开，介绍不同旗帜的含义，核心是通过这些旗帜保障水上安全，选项D“Flags Teach Safety”最能概括文章主旨；A选项“Follow Beach Rules”过于宽泛，B选项“Swim with Lifeguards”仅涉及部分内容，C选项“Colours Tell Danger”未涵盖安全相关旗帜的内容，均不符合。
【答案】
61.D 62.B 63.D 64.C 65.D
【知识点】
1. 词义推断
2. 细节查找
3. 主旨归纳
【点评】
本文是一篇实用类说明文，介绍了海滩旗帜系统的不同含义，贴近生活实际。题目主要考查细节查找、词义推断和主旨归纳能力，解题关键在于精准定位原文信息，结合上下文语境分析理解。
【难度系数】
0.7