Yuan Longping, the world-famous Chinese agronomist, known for developing the first hybrid rice strains（杂交水稻）, died of illness at 13:07 BJT on Saturday     1     the age of 91.

Yuan spent his whole life on the research of hybrid rice     2     helped China work a great wonder—feeding nearly one     3    （five）of the world’s population with less than 9 percent of the world’s total land.

Yuan invented the world’s first high-yielding hybrid rice strain     4     （success）in 1973, which could reach a yield（产量）of over 500 kg/mu from the previous 300 kg/mu. For the next forty years, he     5    （continue）to research and achieved higher and higher yield. In 1996, the Chinese government set up     6     super rice program. Four years later, the first goal of the 10.5 tonnes/hectare     7    （achieve）. The record was broken three more     8    （time）with jumps to 12 tonnes in 2004, 13.5 tonnes in 2011 and 15 tonnes in 2014.

Yuan once said he had two dreams—one is to “enjoy the cool under the rice crops     9    （tall）than men” and the other one is that “hybrid rice could be grown all over the world     10    （help）solve the global food shortage”.