练习题十六
文章节选： The Internet of Things (IoT) is a rapidly evolving technology that connects various devices and allows them to communicate with each other. This technology has numerous applications, such as smart homes, where devices like thermostats and security systems can be controlled remotely. In agriculture, IoT can be used to monitor soil moisture and optimize irrigation systems. The potential benefits of IoT include increased efficiency and cost savings.

题目： What is the main idea of the passage? A. The challenges of implementing IoT B. The applications and benefits of IoT C. The history of IoT technology D. The impact of IoT on privacy

答案解析： 正确答案是B。文章主要介绍了物联网的应用，如智能家居和农业监测，以及其带来的好处，如提高效率和节省成本，强调了物联网技术的广泛应用和潜在益处.

练习题十七
文章节选： The use of plastic bags has become a major environmental concern due to their impact on ecosystems. Many cities and countries have implemented policies to reduce plastic bag usage, such as banning their distribution or imposing taxes on them. Consumers are encouraged to use reusable bags as an alternative. This shift towards reusable bags can help reduce waste and protect the environment.

题目： What is the main idea of the passage? A. The benefits of plastic bags B. The environmental impact of plastic bags C. The history of plastic bag usage D. The production process of plastic bags

答案解析： 正确答案是B。文章主要讨论了塑料袋对环境的影响及其对生态系统的影响，以及减少塑料袋使用的政策和措施，如禁止分发或征收税费，鼓励使用可重复使用的袋子，强调了保护环境的重要性.

练习题十八
文章节选： The concept of "work-life integration" is becoming more prevalent in today's fast-paced society. Unlike work-life balance, which implies a clear separation between work and personal life, work-life integration involves blending the two. This approach allows individuals to be more flexible and responsive to both work and personal demands. It can lead to increased job satisfaction and a more fulfilling life overall.

题目： What is the main idea of the passage? A. The importance of work-life balance B. The rise of work-life integration C. The challenges of balancing work and personal life D. The benefits of a flexible work schedule

答案解析： 正确答案是B。文章主要介绍了工作与生活融合的概念及其与工作与生活平衡的区别，强调这种融合方式使个人能够更灵活地应对工作和个人需求，从而提高工作满意度和生活质量.

练习题十九
文章节选： The development of 5G technology has the potential to revolutionize various industries. It offers faster internet speeds and lower latency, which can enable new applications such as autonomous vehicles and smart cities. In healthcare, 5G can facilitate real-time monitoring of patients and remote consultations. In entertainment, it can enhance virtual reality experiences and streaming services. The widespread adoption of 5G is expected to drive economic growth and create new job opportunities.

题目： What is the main idea of the passage? A. The history of 5G technology B. The potential applications of 5G technology C. The challenges of implementing 5G D. The impact of 5G on the job market

答案解析： 正确答案是B。文章主要介绍了5G技术的潜在应用，如自动驾驶、智能城市、医疗监测和娱乐体验等，强调了5G技术在推动经济增长和创造就业机会方面的潜力.

练习题二十
文章节选： The concept of "green living" has gained significant attention in recent years. It involves making lifestyle choices that are environmentally friendly and sustainable. For instance, using public transportation instead of driving a car can reduce carbon emissions. Similarly, recycling and reducing waste are also essential components of green living. By adopting these practices, individuals can contribute to the preservation of the environment.

题目： What is the main idea of the passage? A. The benefits of using public transportation B. The concept of green living C. The impact of waste reduction on the environment D. The importance of recycling

答案解析： 正确答案是B。文章主要介绍了绿色生活的概念及其包括的具体实践，如使用公共交通、回收和减少浪费等，强调了个人在保护环境方面的作用和贡献.