根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。 Rice is a big part of Chinese life. In the past, people greeted each other by 1. 'Have you had your rice?' And some people 2. say it today. China is the world's largest rice-growing 3. . In 2003, China grew 166 million tons of rice. But it is not 4. to feed the world's largest population. In the 1960s, thousands of Chinese 5. because they had no food to eat. In the 1970s, a Chinese scientist, Yuan Longping, grew a new 6. of rice called hybrid rice (杂交稻). It makes 20 percent more rice than 7. types of rice. Hybrid rice is much stronger than common rice. It can grow in lots of water or in not much water. It also doesn't easily get diseases or worms. Yuan is known 8. the 'father of hybrid rice.' At the end of last month, he 9. the World Food Prize for his work to help feed so many people. Today, half of China's rice plants are Yuan's special hybrid. China uses Yuan's hybrid to grow much 10. rice than before.