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What is the difference between the two camps in their suggested solutions to the water problem?

What is the water problem facing one quarter of India's population?

In addition to the climate, the author thinks another major cause of India's water problem is ______.

What do we learn about the report by the National Aeronautics and Space Administration?

What has the sand mafia done to make the water problem worse?

The author suggests at the end of the passage that India's Prime Minister should ______.

中国众多的河流和湖泊提供了充足和可靠的水供应。但由于高速的经济发展，饮用水源头大多已遭到污染。全国水资源分布不均，而且据预测，2030年中国人口将达16亿。水资源稀缺将不可避免地成为重大关切。南水北调工程(the South-North Water Transfer Project)已开始从长江输水至山东省。水利部在十三五规划中突出了水安全(security)对于国家安全的战略意义，并将加大力度保护水资源和恢复水生态系统。

China's numerous rivers and lakes provide abundant and reliable water supplies. However, due to the high rates of economic development, the sources of drinking water have been mostly polluted. Water resources are unevenly distributed throughout the country. Moreover, it is predicted that its population will reach 1.6 billion by 2030. Water scarcity will inevitably become a major concern. The South-North Water Transfer Project has begun to deliver water from the Yangtze River to Shandong Province. In the 13th Five-Year Plan, the Ministry of Water Resources highlights the strategic importance of water security to national security. It will intensify efforts to conserve water resources and restore the water ecosystem.【缺少答案，请补充】

We live in a digital age. It is becoming cheaper and truly more convenient for us to get connected to the Internet anytime and anywhere. Over the years ______ technological advances have made it possible to introduce new means of communication and expression. In the past, we went ______ through browsers on our fixed line-connected PC and put ourselves at the receiving end for information. In today's fast-paced life, we find ourselves no longer ______ the Web nearly as much anymore. There is an increasing trend that we get in touch with friends more easily through mobile devices with built-in Wi-Fi features such as smartphones and tablet computers. ______ the first stage of the Web development, social ______ on mobile devices operate under a dialogic model, which is different from the traditional one. The mobile apps available help to manage new types of online activities. They allow individuals, communities and organizations to actively create and ______ content online. They also allow us to ______ with one another by sharing details about our lives, photos and thoughts. Examples of such new media include blogs, wikis and social networks. However, social media have been ______ for issues with reliability of information presented when there are no proper rules ______ to online behavior. Compared with information from traditional media, particularly books, trust in information from social media sources is low. In the ______ of firm evidence, some people even go so far as to use social media to quickly spread misinformation, lies and rumors.

College students seem unable to get off their cellphones. Professors find it challenging to get students to stop using their cellphones in class. Doug Duncan, a professor at the University of Colorado has come up with a solution to smartphone distraction in his astronomy class. ______ He has published a paper showing that, at his college, more than 75 percent of undergrads reported texting while in class, and that in-class texting was linked to an average drop of half a【缺少答案，请补充】

In the past, we went ______ through browsers on our fixed line-connected PC and put ourselves at the receiving end for information.【仅支持A-H选项，选项超出支持范围】

In today's fast-paced life, we find ourselves no longer ______ the Web nearly as much anymore.【仅支持A-H选项，选项超出支持范围】

There is an increasing trend that we get in touch with friends more easily through mobile devices with built-in Wi-Fi features such as smartphones and tablet computers. ______ the first stage of the Web development, social ______ on mobile devices operate under a dialogic model, which is different from the traditional one.【仅支持A-H选项，选项超出支持范围】

The mobile apps available help to manage new types of online activities. They allow individuals, communities and organizations to actively create and ______ content online.【仅支持A-H选项，选项超出支持范围】

They also allow us to ______ with one another by sharing details about our lives, photos and thoughts.【仅支持A-H选项，选项超出支持范围】

Examples of such new media include blogs, wikis and social networks.【仅支持A-H选项，选项超出支持范围】

However, social media have been ______ for issues with reliability of information presented when there are no proper rules ______ to online behavior.【仅支持A-H选项，选项超出支持范围】

Compared with information from traditional media, particularly books, trust in information from social media sources is low.【仅支持A-H选项，选项超出支持范围】

In the ______ of firm evidence, some people even go so far as to use social media to quickly spread misinformation, lies and rumors.【仅支持A-H选项，选项超出支持范围】

What is the finding reported in Doug Duncan's published paper?

What experiment did Duncan carry out to reduce cellphone use in class?

Larry Rosen advises other professors not to follow Duncan's lead because ______.

What has Rosen found in his experiments about students not allowed to use cellphones?

What solution does Rosen offer?

The author thinks that after school teens should spend time ______.

What does the author mean by "crossing these bridges" (Line 7, Para. 2)?

What does the author say about the advantage of chatting online?

What is the author's view of face-to-face communication?