练习四
文章： In recent years, there has been a growing interest in the concept of work-life balance. Many people are seeking ways to achieve a better balance between their professional and personal lives. This is due to the increasing demands of work and the desire for more quality time with family and friends. Achieving work-life balance can lead to greater job satisfaction, improved mental and physical health, and overall happiness. Companies are also recognizing the importance of supporting their employees' work-life balance, as it can lead to increased productivity and employee retention. Strategies for achieving work-life balance include setting boundaries between work and personal time, prioritizing tasks, and utilizing flexible work arrangements when possible.

题目： What is the main idea of the passage? A. The importance of work-life balance. B. The challenges of achieving work-life balance. C. The benefits of work-life balance. D. Strategies for achieving work-life balance.

答案：A

解析：文章主要讨论了工作与生活平衡的概念及其重要性，包括人们追求工作与生活平衡的原因、其带来的好处以及公司对此的支持，因此选项A“工作与生活平衡的重要性”是文章的主旨.

练习五
文章： The role of technology in education has evolved significantly over the past few decades. With the introduction of computers, the internet, and digital tools, teaching and learning have become more interactive and engaging. Technology has made it possible for students to access a vast amount of information and resources from anywhere in the world. It has also enabled teachers to create more dynamic and personalized learning experiences. However, there are concerns about the potential negative effects of technology on students' attention spans and social skills. To maximize the benefits of technology in education, it is important to find a balance between its use and traditional teaching methods.

题目： What does the passage mainly discuss? A. The advantages of technology in education. B. The disadvantages of technology in education. C. The evolution of technology in education. D. The future of technology in education.

答案：C

解析：文章主要讨论了技术在教育中的演变，包括其带来的积极影响和潜在的负面影响，因此选项C“技术在教育中的演变”是文章的主旨.

练习六
文章： The concept of sustainable development has gained increasing attention worldwide. It refers to meeting the needs of the present without compromising the ability of future generations to meet their own needs. Sustainable development involves balancing economic growth, social progress, and environmental protection. Governments and businesses are taking various measures to promote sustainable development, such as investing in renewable energy, implementing environmental regulations, and encouraging responsible consumption. Achieving sustainable development requires the collective efforts of individuals, communities, and nations. It is essential for everyone to be aware of the importance of sustainable development and to take action to contribute to a better future.

题目： What is the passage mainly about? A. The definition of sustainable development. B. The importance of sustainable development. C. Measures to promote sustainable development. D. The challenges of sustainable development.

答案：B

解析：文章主要讨论了可持续发展的重要性，包括其定义、涉及的经济、社会和环境保护的平衡以及政府、企业和个人在促进可持续发展中的作用，因此选项B“可持续发展的重要性”是文章的主旨.