Diets have changed in China — and so too has its top crop. Since 2011, the country 1 (grow) more corn than rice. Corn production has jumped nearly 125 percent over 2 past 25 years, while rice has increased only 7 percent. A taste for meat is 3 (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn’s rise:The government encourages farmers to grow corn instead of rice 4 (improve) water quality. Corn uses less water 5 rice and creates less fertilizer(化肥) runoff. This switch has decreased 6 (pollute) in the country’s major lakes and reservoirs and made drinking water safer for people.

According to the World Bank, China accounts for about 30 percent of total 7 (globe) fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005 — when the government 8 (start) a soil-testing program 9 gives specific fertilizer recommendations to farmers — and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China’s approach to protecting its environment while 10 (feed) its citizens "offers useful lessons for agriculture and food policymakers worldwide," says the bank’s Juergen Voegele.

优得有法件途学2294ae08升544e限慧元科网习司技公-广软东 本文是说明文，文章介绍了中国近年来根据人们膳食的变化调整农作物种植结构。

【核心词汇】account for 说明(原因、理由等); 导致，引起; (在数量、比例上)占; 对……负责specific adj. 明确的; 特有的，具体的recommendation n. 推荐; 推荐信; 建议carbon dioxide 二氧化碳

1.has grown考查时态。由句中的时间状语Since 2011可知，此空应用现在完成时。

2.the考查冠词。此处是特指，故用定冠词the。over the past 25 years表示"在过去的25年里"。

3.actually考查副词。这里需填副词来修饰谓语动词is。

4.to improve考查非谓语动词。不定式to improve water quality作目的状语。

5.than考查介词。由空前的less可知，此处应用介词than，表示"比"。

6.pollution考查名词。此处应填pollute的名词形式pollution作宾语。

优得4ee1司元8f385835公-途62166358网习慧软d720f54a智根限广9b0f点升544e9a30技有法上方学东科件学2294ae08

7.global考查形容词。此处应填globe的形容词形式global作定语。

8.started考查时态。根据语境可知，此处叙述发生在过去的情况，应用一般过去时，故填started。

9.that/which考查定语从句。分析句子结构可知，空处引导定语从句，a soil\|testing program是先行词，指物，且定语从句中缺主语，所以应填关系代词that或which。

10.feeding考查现在分词。while feeding its citizens是时间状语从句while it is feeding its citizens的省略结构。又可理解为此处的feed(养活)与主语China为逻辑上的主谓关系，故用现在分词形式。