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动词应用（共7小题，计7分）
根据短文内容，用括号内所给动词的适当形式填空，必要时可加助动词或情态动词。
Yuan Longping, a Chinese scientist, has saved people without any magic. His success on hybrid rice (杂交水稻) fed millions of people in hunger.
Yuan 【小题1】 (be) born on September 7, 1930. After graduating from the then Southwest Agriculture Institute (农业学院), he worked as a teacher at an agriculture school in Hunan.
About 50 years ago, some natural disasters (灾难) hit China. Yuan saw many people lose their lives because of hunger every day. Since then, he 【小题2】 (do) research on how to grow good quality rice. In 1964, he found a natural hybrid rice plant by accident. It had great advantages over others. Yuan was excited about what he discovered. He then decided 【小题3】 (study) this particular plant.
In 1973, he started to grow a type of hybrid rice. It 【小题4】 (produce) 20% more rice each unit than common ones. The next year he had a great success. This progress made China the world’s leader in rice production.
In China, most r ice fields (稻田) grow Yuan’s hybrid rice. He 【小题5】 (call) the “Father of Hybrid Rice”.
Now he is 84 years old. He still 【小题6】 (have) a dream. He hopes hybrid rice 【小题7】 (grow) as tall as Chinese sorghum (高粱) one day!
【答案】
【小题1】was
【小题2】has done
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