2．He thought there was only one way -by crossing different species of rice plant，and then he could produce a new plant which could give a higher yield than either of the original plants.

　　他认为，唯一的办法就是使不同种类的水稻杂交，这样才能培育出比原先任何一种水稻产量都要高的新品种。

　　【答案】　1.the key to feeding；to have；to produce　2.to do this

　　　阅读P32教材课文，选择最佳答案

　　1．Why was Yuan given the nickname "the student who asks questions"？

　　A．Because he was stupid.

　　B．Because he did not learn well in the class.

　　C．Because he was curious about the lessons and wanted to learn more.

　　D．Because he learned more questions.

　　2．From the passage we know that Yuan Longping ．

　　A．got interested in plants in college

　　B．studied in an agricultural school when he was a boy

　　C．asked a lot of questions at school when he was a boy

　　D．began experiments in crop breeding when he was a college student

　　3．In Yuan's opinion，the only way to produce more rice and to produce it more quickly was to ．

　　A．increase rice planting areas

　　B．develop a new kind of fast growing rice

　　C．search for a special type of rice plant

　　D．develop a new kind of rice which can give a higher yield

　　4．According to the text we can know that ．

　　A．rice is grown in most European countries

　　B．wheat is the most important crop in Pakistan

C．Yuan's research was supported by himself