四六级

2018英语四级阅读理解过级训练(146)

时间:2018-08-23 来源:文都网校 浏览: 分享:

      在英语四级阅读这个板块中,选词填空是最需要技巧的,也是拿分难点,下面小编为大家带来了一篇英语四级阅读选词填空题,希望各位考生多加练习,早日取得好成绩!

      Our planet is thirsty — thirsty because it is hungry. It takes one thousand times more water to feed the human population than it does to satisfy its thirst.

      Water lies at the core of sustainable development concerns, and its rational and equitable management is crucial for human survival. That was one of the key messages to arise from the World Summit on Sustainable Development2 that was held in Johannesburg this summer. Next year's Third World Water Forum in Japan will address this issue in greater depth.

      It is therefore fitting that this year's World Food Day spotlights the role of water in food security. Without water, there can be no food production. In fact, the agricultural sector is the user of 70 percent of the planet's water supply. In a world in which per capita water availability is declining, we need to focus on appropriate water management if we are to sufficiently increase food production, with a view to reduce hunger and malnutrition, and feed a population expected to rise to 8 billion in 30 years'time.

      Shortage of water threatens extensive agricultural regions in developing countries and fans the prospect of food crises. At present, twenty countries do not have enough water to produce the food their populations need. In some cases, the overexploitation of water resources undermines future agricultural production, while in others, their underexploitation inhibits development.

      The combined vicious impact of poverty, rising demand for food and insufficient availability of water therefore poses a serious challenge for world food security and universal access to clean water. One billion people are deprived of clean water, and most of these people are also hungry. They live in rural areas and agriculture is their main source of income.

      How are we to ensure water availability and food security, while safeguarding the environment? At present, more than one-third of the world's food production comes from the irrigated areas that make up 16 percent of the planet's arable land. Irrigated farming is at least twice as productive as rainfed farming3, and during the next 30 years some 70 percent of additional food production in developing countries should come from irrigated land.

      It is urgent to avoid poor irrigation practices that have often led to diminishing water supplies, land degradation and spread of disease . Far too often, more water is being pumped than can possibly be recharged. Also , too much water is being lost along canals, because of leakage , wastage , seepage or evaporation. Too many schemes are losing productivity because of inappropriate drainage, waterlogging and a build-up of salts in the soil.

      We thus have to turn increasingly to adopt integrated watershed management, curb the upstream deforestation that generates flooding and erosion, and significantly increase investment in water control infrastructure. Finally, water use will be sustainable only if it is done in a socially equitable manner.

      New water policy, and institutions and laws will facilitate the integrated management of river basins and water resources by all stakeholders, in a climate of transparency, accountability and social justice.

      The cooperation of all development partners, the public, private and non-profit sectors at national and international level, will be indispensable to resolve conflicts of interest, mobilize substantial financial resources and create conditions for a fairer distribution of food and water.

      The countries of Africa , the Middle East and southern Asia that are already facing serious water shortages will see their situation rapidly worsen unless there is stronger solidarity between the regions of abundance and the regions of scarcity. Such solidarity is necessary if we are to avoid a proliferation and aggravation of tensions relating to water .

      Ⅰ. Fill in each blank with proper words or phrases from the passage :

      1. Many people in Africa ( 剥夺) their rights of living peacefully.

      2. A few of spies are planning to ( 破坏) the social stability.

      3. Library is usually regarded as a ( 非盈利) organization.

      Ⅱ. Question :

      Why should we avoid poor irrigation practices?

      参考答案:

      Ⅰ. 1. are deprived of 2. undermine 3 . non-profit

      Ⅱ. Because such practices have often led to diminishing water supplies, land degradation and spread o

      f disease.

      以上就是小编为大家提供的英语四级阅读训练题,希望对大家有帮助。想了解更多四六级备考课程备考资讯,请点击文都网校四六级资讯站查询!有问题找文都☞☞☞详情咨询入口>>>

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