Ⅰ.教材活用——根据课文内容完成下面的短文
Yuan Longping is a 1.______ (lead) figure in the ricegrowing world in China.2.____ was interested in plants from 3.____ early age，and he went to study agriculture in college and began crop breeding experiments 4.____a young teacher.Then he brought up a plan to produce 5.______(much) rice by crossing different species of rice plant.He put his plan into practice and the results 6.________ (publish) in China in 1966.In 1970，he discovered a 7._______ (natural) sterile male rice plant,8._______ was a breakthrough.
