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  3. Water is one of the most important natural resources in the world. Everywhere, water use is【61】. Humans already use fifty-fo

Water is one of the most important natural resources in the world. Everywhere, water use is【61】. Humans already use fifty-fo

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问题     Water is one of the most important natural resources in the world.
    Everywhere, water use is【61】. Humans already use fifty-four percent of all the【62】 water in rivers, lakes and underground. There are some estimates that this【63】will reach seventy percent by 2005.
    Fresh water is necessary for life on Earth. People need water for【64】activities and to produce food. Water also is important for energy production and health of Earth’s environmental systems.
    The United Nations is organizing a【65】of events to increase concern【66】water issues. UN officials have【67】2003 the International Year of Fresh Water. A goal of the【68】is to build support for policies to use water more【69】.
    Another goal is to get more people to use water in a way【70】will not hurt environment. The world population is more than six-thousand-million people. More than one-thousand-million【71】safe drinking water. More than two-thousand-million【72】 from diseases【73】to dirty water. And, more than two-thousand-million live without waste-treatment systems.
    Water was one of the issues discussed at the UN Millennium Summit two years ago. Leaders said they would work to【74】the number of people without safe drinking water in half by 2015.
    Nitin Desai directs the UN Office for Economic and Social Affairs. He says success【75】 these goals will require major changes in the ways people use water.
    Next month, the World Water Forum will meet in Kyoto, Japan. Officials plan to【76】the first UN report【77】world water development.  This report will examine the world’s water problems.【78】it will offer suggestions on ways to meet future water demands.  Experts say international reaction【79】the UN report will be an important test of the political desire to solve the water【80】.
选项 A、ratio
B、speed
C、pace
D、rate
答案D
解析 54%和70%都是淡水资源的使用率，因此，应该用 rate(率)，通常用百分数表示数值。而 ratio 表示“比；比例”，如：The ratio of nursing staff to doctors is 2：1．(护理人员和医生的比例为二比一。)；speed 表示“速度；速率”；pace 表示 “步速；步调；节奏”。
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