Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwes...

问题详情：

Dr. Yuan was born in Beijing in 1930. 61 he graduated from Southwest Agricultural College in 1953, he has given his life to 62 ( find ) ways to grow more and more rice.

As a young man, he saw the great need for increasing the rice output. At that time, famine was 63 serious problem in many parts of the country. Dr. Yuan searched 64 a way to increase rice harvests without expanding the area of fields. In 1950, Chinese farmers could only produce fifty million tons of rice. Last year, 65 , nearly two hundred million tons of rice 66 ( produce ). These increased harvests mean that 22% of the 67 ( world ) people

are fed from just 7% of the farmland in China. Dr. Yuan is now circulating his knowledge in India, Vietnam and other less developed countries 68 ( increase ) their rice harvests. Thanks to his research, the UN is trying to rid the world of 69 ( hungry ). Using his hybrid rice farmers are producing harvests twice 70 ( large ) than before.

【回答】

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