【答案解析】古往今来人们试图把家园建在淡水水源附近。如今淡水变得日益稀少，但由于世界人口的增长，对淡水的需求却越来越大。有些工业还大量使用淡水生产诸如钢铁、石油、纸张和合成橡胶等产品。科学家估计到2050年淡水需求将翻一番。如果他们估计正确的话，我们必须找到节约淡水或生产淡水的新方法。 [听力原文]
All through history men have tried to build their homes near the sources of fresh water. Now fresh water is becoming scarce, but more and more is needed because of the increasing population in the world. Some industries also use large amounts of fresh water in the productions of things such as steel, petroleum, paper, and synthetic rubber. Scientists estimate that the need for fresh water will have doubled by 2050. If they are correct, we must find new ways of saving it or producing it.

【答案解析】在印度，虽然学校的招生人数在上升，但每年仍有数百万儿童辍学。2014年，将近20%的儿童没有完成初等/基础教育。为帮助这些辍学学生，志愿中心正在培训其中一些儿童使他们重返校园。虽然接受免费初等/基础教育是当今的一项权利，但有许多问题导致儿童无法上学。其中一个主要问题是许多文盲家庭不理解教育的重要性。 [听力原文]
Millions of children in India drop out of school every year although enrollment at school in the country is rising. In 2014, nearly 20 percent of children did not complete primary education. To help dropout students, voluntary centers are training some of these children to return to school. There are many issues that keep children out of school although free primary education is now a right. One major issue is that many illiterate families do not understand the importance of education.