练习题二十一
文章节选： The popularity of social media has grown exponentially in the past decade. Platforms like Facebook, Instagram, and Twitter have become integral to daily life for many people. While social media offers numerous benefits, such as connecting people and providing information, it also has its drawbacks. For instance, excessive use of social media can lead to decreased productivity and increased feelings of anxiety and depression.

题目： What is the main idea of the passage? A. The benefits of social media B. The drawbacks of social media C. The impact of social media on daily life D. The history of social media platforms

答案解析： 正确答案是C。文章主要讨论了社交媒体对日常生活的广泛影响，既包括其连接人和提供信息的好处，也包括过度使用可能导致的生产力下降和心理健康问题等缺点.

练习题二十二
文章节选： The concept of "flexible work arrangements" is becoming more prevalent in the modern workplace. These arrangements allow employees to have more control over their work schedules and locations. For example, some companies offer flexible hours, allowing employees to start and end their workday at times that suit them best. This can lead to increased job satisfaction and productivity, as employees are able to balance their work and personal lives more effectively.

题目： What is the main idea of the passage? A. The challenges of flexible work arrangements B. The prevalence of flexible work arrangements C. The benefits of flexible work arrangements D. The history of work arrangements

答案解析： 正确答案是C。文章主要介绍了灵活工作安排的好处，如提高工作满意度和生产力，帮助员工更好地平衡工作与个人生活，强调了这种工作模式在现代职场中的流行趋势.

练习题二十三
文章节选： The use of artificial intelligence (AI) in the job market is transforming the nature of work. AI can automate many tasks, leading to increased efficiency and productivity. However, this also raises concerns about job displacement, as some jobs may be replaced by AI systems. On the other hand, AI can create new job opportunities in areas such as AI development and data analysis. The future of the job market will likely involve a combination of human and AI collaboration.

题目： What is the main idea of the passage? A. The benefits of AI in the job market B. The impact of AI on the job market C. The challenges of AI development D. The future of AI technology

答案解析： 正确答案是B。文章主要探讨了人工智能对就业市场的影响，既包括提高效率和生产力的好处，也包括可能导致的工作替代问题，以及创造新就业机会的可能性，强调了未来就业市场中人与AI合作的趋势.

练习题二十四
文章节选： The concept of "urbanization" refers to the growth of cities and the movement of people from rural areas to urban areas. This process has led to significant changes in the way people live and work. While urbanization has brought economic development and improved living standards, it has also resulted in challenges such as environmental pollution and traffic congestion. Many cities are now focusing on sustainable urban development to address these issues.

题目： What is the main idea of the passage? A. The benefits of urbanization B. The challenges of urbanization C. The process of urbanization D. The impact of urbanization on society

答案解析： 正确答案是D。文章主要讨论了城市化对社会的影响，既包括经济发展和生活水平提高的好处，也包括环境污染和交通拥堵等挑战，强调了城市化带来的广泛社会变化.

练习题二十五
文章节选： The rise of remote work has changed the way many people work and live. With the ability to work from anywhere, employees have more flexibility and freedom. This shift has allowed people to relocate to areas with a lower cost of living and enjoy a better work-life balance. However, remote work also presents challenges such as the need for effective communication and the potential for feelings of isolation. Companies are now adapting their strategies to support remote employees and maintain productivity.

题目： What is the main idea of the passage? A. The benefits of remote work B. The challenges of remote work C. The impact of remote work on the workforce D. The history of remote work

答案解析： 正确答案是C。文章主要探讨了远程工作对劳动力的影响，既包括提高灵活性和工作生活平衡的好处，也包括沟通和孤立感等挑战，强调了公司为支持远程员工而调整策略的必要性.