2011年大学英语六级改错模拟练习题39
Thomas Malthus published his "Essay on the Principleof 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.
1. being -%26gt; been
2. their -%26gt; its
此处物主代词指food，所以要用单数形式的所有格its。
3. relative -%26gt; relatively
修饰形容词（此处是过去分词形式）要用副词，所以要把relative改为relatively。
4. good -%26gt; bad / poor
从逻辑上说，应该是收成不好（bad / poor harvest）是带来粮食危机（food crisis） 的原因之一，所以应该把good改为poor或者bad。
5. as -%26gt; /
此处是表示“即使”的意思，所以应该去掉as，即even if。
6. politics -%26gt; political
Politics是名词，修饰名词reasons要用形容词.
7. by -%26gt; for
for instance“例如”是固定搭配。
8. double -%26gt; doubled
have (more than) doubled
9. few -%26gt; fewer
And连接两个对称结构，此处均比较级：fewer stems and more seeds。
10. crop -%26gt; crops
crop意为“庄稼，作物”时是可数名词，要用复数形式。
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