Born in 1930, Yuan Longping graduated from Southwest Agricultural College in 1953. Since then, ________ (find) ways to grow more rice has been his life _____. As a young man, he saw the great need ______ increasing the rice output. At that time, hunger was a _____ problem in many parts of the countryside. Yuan Longping searched for a way to increase rice harvests without _____ the area of the fields. Yuan Longping grows _______ is called super hybrid rice. In 1973, he became the first agricultural pioneer in the world _________ (grow ) rice that has a high output. This special strain of rice makes ____ possible to produce 20% more of the crop in the same fields. He is now ___ his knowledge in many less developed countries to increase their rice harvests. Thanks to his research, the UN has more tools in the battle to rid the world _____ hunger.