Yuan Longping, “the father of hybrid rice(杂交水稻)”, is one of the most important agricultural scientists. He had spent his whole life on hybrid rice.
Food was a big problem in China in the past. It was because China had 22% of the world’s population, but only 7% of its farmland. In the 1960s, China had serious hunger. Millions of people died because they had no food. professor Yuan was very sad to see this. “How can I help people have enough food?” he thought. He decided to work on a new kind of hybrid rice that had a high output(产量). He and his team studied the rice seeds(种子)day and night. At last, in 1973, they grew a new kind of hybrid rice. This rice is strong. Farmers can grow it in many different kinds of farmland and also in bad weather. It can also fight diseases. Its output is much higher than common kinds of rice.
Professor Yuan has already left us, but he will be remembered forever.
10.What had Yuan Longping spent his whole life on?______
A.Population.
B.Weather.
C.Hybrid rice.
11.What made millions of people die in the 1960s?______
A.No food.
B.Serious diseases.
C.No seeds.
12.When did they grow a new kind of hybrid rice?______
A.In 1960.
B.In 1973.
C.In 2020.
13.Which of the following is TRUE about hybrid rice?______
A.Its output is much higher.
B.It is not strong enough.
C.It can’t grow in bad weather.
10. C. Hybrid rice.
答案解析：
10.C. Hybrid rice.
解析：根据文章第一段，"Yuan Longping, 'the father of hybrid rice', is one of the most important agricultural scientists. He had spent his whole life on hybrid rice." 可以得知，袁隆平一生致力于杂交水稻的研究。
11. A. No food.
解析：文章第二段提到，"In the 1960s, China had serious hunger. Millions of people died because they had no food." 说明了在1960年代，由于没有食物，数百万人死亡。
12. B. In 1973.
解析：文章第三段提到，"At last, in 1973, they grew a new kind of hybrid rice." 表明他们是在1973年培育出了新的杂交水稻。
13. A. Its output is much higher.
解析：文章第三段提到，"Its output is much higher than common kinds of rice." 说明杂交水稻的产量远高于普通水稻。选项B和C与文章中提到的杂交水稻的特性相反，因此不正确。
