题目内容：

语法填空

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式，并将相应答案写在答题纸上。

   1.   in 1930, Yuan Longping graduated from Southeast Agricultural College in 1953. Since then, finding ways to grow more rice 2.  (be) his life goal. As a young man, he saw the great   3.   for increasing the rice output. At that time, hunger was a   4. (disturb) problem in many parts of the countryside. Yuan Longping grows   5.   is called super hybrid rice, making   6.  possible to increasing rice harvest without   7.   (expand) the area of the field. Yuan Longping has been considered the first agricultural pioneer in the world    8.  (grow) rice that has a high output.  9.  to his research, the UN has more tools in the battle to rid the world 10.   hunger.