2013年12月英语六级改错训练（5）
Thomas Malthus published his “Essay on thePrinciple 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.
【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
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