Many great people in the world devote themselves to (improve) society in their own ways. For example, Jane Goodall, a woman from Britain, would rather spend time studying chimps in the wild in Africa than (lead) a comfortable life. For 40, years she (be) outspoken about making the rest of the world understand and respect the life of chimps. Lin Qiaozhi, a specialist in women's diseases, is another woman who has made great (achieve).There was story after story of no matter tired after a day's work, she went late at night to deliver a baby for a poor family. It was because of her hard work and great consideration to her patients that hundreds of babies (deliver) safely by her. third example is Yuan Longping, the first agricultural pioneer in the world (grow) super hybrid rice. Using his hybrid rice, farmers can produce harvests twice as large as before. Therefore, now the UN has more tools in the battle to rid the world hunger. In short, so (impress) is their work that they all deserve praising and learning from.