2013年12月英语六级改错训练（5）

英语自学网

Thomas Malthus published his “Essay on the
　　Principle of Population” almost 200 years ago. Ever since then,
　　forecasters have being warning that worldwide famine was 1.____
　　just around the next corner. The fast-growing population’s
　　demand for food, they warned, would soon exceed their 2.____
　　supply, leading to widespread food shortages and starvation.
　　But in reality, the world’s total grain harvest has risen
　　steadily over the years. Except for relative isolated trouble 3.____
　　spots like present-day Somalia, and occasional years of
　　good harvests, the world’s food crisis has remained just 4.____
　　around the corner. Most experts believe this can continue
　　even as if the population doubles by the mid-21st century, 5.____
　　although feeding 10 billion people will not be easy for
　　politics, economic and environmental reasons. Optimists 6.____
　　point to concrete examples of continued improvements
　　in yield. In Africa, by instance, improved seed, more 7.____
　　fertilizer and advanced growing practices have more than
　　double corn and wheat yields in an experiment. Elsewhere, 8.____
　　rice experts in the Philippines are producing a plant with few 9.____
　　stems and more seeds. There is no guarantee that plant
　　breeders can continue to develop new, higher-yielding
　　crop, but most researchers see their success to date as reason 10.____
　　for hope.
        　　
            
            

ensix

              【参考答案】
　　1. 把 being 改为 been
　　2. 把 their 改为 its
　　3. 把 relative 改为 relatively
　　4. 把 good 改为 bad
　　5. 把 as 去掉
　　6. 把 politics 改为 political
　　7. 把 by 改为 for
　　8. 把 double 改为 doubled
　　9. 把 more 改为 fewer
　　10. 把 reason 改为 the reason