填空题 {{I}}The following passage contains TEN errors. Each indicated line contains a maximum of One error. In each case, only One word is involved. You should proofread the passage and correct it in the following way. For a wrong word, underline the wrong word and write the correct one in the blank provided at the end of the line, For a missing word, mark the position of the missing word with a "A "sign and write the word you believe to be missing in the blank provided at the end of the line. For an unnecessary word, cross out the unnecessary word with a slash.{{/I}}
Humanity uses a little leas than half the water available worldwide.
Yet occurrences of shortages and droughts are causing famine in some
areas, but industrial and agricultural by-products are polluting water supplies. {{U}} 1 {{/U}}______
Since the world's population is expecting to double in the next 50 years, {{U}} 2 {{/U}}______
many experts think we are on the edge of a widespread water crisis.
But that doesn't have to be the outcome. Water shortages do not
have to trouble the world—if we started valuing water more than we {{U}} 3 {{/U}}______
have in the past. Just like we began to appreciate petroleum more after {{U}} 4 {{/U}}______
the 1970s oil crisis, today we must start looking at water from a fresh
economical perspective. We can no longer afford to consider water a {{U}} 5 {{/U}}______
virtual free resource of which we can use as much as we like. {{U}} 6 {{/U}}______
Instead, for all uses except the domestic demand of the poor,
governments should price water to reflect their actual value. This means {{U}} 7 {{/U}}______
charging a fee for the water itself as well as for the demand costs. (61)
Governments should also protect this resource by providing
water with more economically and environmentally sound ways. {{U}} 8 {{/U}}______
Often the cheapest way to provide irrigation water in the dry tropics
is through small-scaled projects, such as gathering rainfall in depressions {{U}} 9 {{/U}}______
and pumping it to nearby cropland.