第三节 语法填空
Rice is the most widely consumed food for a large part of the world's human population，especially in Asia．It is the most important crop with regard to human nutrition and caloric intake，（61）___ （provide） more than one-fifth of the calories consumed worldwide by （62）___（human）．
According to Chinese legends，it was Shennong，the legendary emperor of China and （63）___（invent） of Chinese agriculture，（64）___discovered rice．A 2012study，（65）___（publish） in Nature，showed that the domestication （驯化） of rice （66）___（occur） in the Pearl River valley region of China was based on the genetic evidence．（67）___East Asia，rice was spread to Southeast and South Asia．It was introduced to Europe through Western Asia，（68）___ to the Americas through Europe．Before this research，the commonly（69）___ （accept） view，based on scientific studies，is that rice was first domesticated in the region of the Yangtze River valley in China．
Today，the majority of all rice produced（70）___（come）fromChina，India，Indonesia，Vietnam，Thailand and so on．Asia farms still account for 87% of the world's total production．