7. Girls and boys in mixed school are able to learn from each other, and to experience different types of skill and talent owned by the opposite sex. Girls and boys learn to live and work together from an early age and are consequently emotionally developed in their relations with the opposite sex.

提示: skill指专门的技能是可数, 比如打字，修水管。泛指技能时不可数。

8. Education has been greatly advanced by the technological advances because students are able to learn on a global scale without ever leaving their classrooms. Agricultural processes that once required dozens upon dozens of human workers can now be automated. People are living longer and life expectancy is increasing because scientific research on new drugs helps us find a cure for some previously fatal diseases. (列举了三个科技的重要影响)

科技的发展极大的促进了教育进步因为学生在坐在教室里就能学习全球的资源。农业生产过去需要大量的劳动力，现在也自动化了。人们的寿命也延长了因为药物的研究让我们找到了治疗一些以前绝症的药物。

9.Telecommuting removes employees from office distractions and allows them to concentrate on their duties, which enhances their working efficiency.

远程通讯让员工不受办公室干扰因素的影响，让他们更能专注在自己的任务上，这能提升他们的工作效率。(远程工作的好处之一)

10. Working from ( at也可以) home makes it difficult for a manager to monitor the performance of teleworkers, and people who adopt this work arrangement often find it hard to gain recognition for their efforts through promotions or performance reviews.（远程工作的缺点）

远程工作的员工的工作表现很难被管理者监控到，因此那些在家里工作的人的付出很难被认可，尤其在他们升职和考核的时候。

11.The use of Internet for banking, social networking, or other services, often makes our personal information vulnerable to theft（盗窃罪, 不可数）. (网络的问题之一)

网络在银行交易，社交网站和其他方面的应用让我们的个人信息容易被盗取。

12. The distance-learning courses are much cheaper and the timetable can be arranged more flexible.(提示: flexible修饰的是timetable，网络教育的优点之一)

远程学习课程的价格便宜，而且学习的时间还可以灵活的安排。