必修四unit2-2.-完形填空练习题.docx

完形填空练习题12篇。要求：切合本单元主题。附中文导读、练习题、答案及解析、核心词汇提炼，难度适宜。Yuan Longping is a Chinese agricultural scientist and educa tor, known for developing the first hybrid rice varieties in the 1970s.Born in 1930 and a 1 from the Southwest Agriculture Institute in 1953, Yuan began his 2 career at an agriculture school in Anjiang, Hunan Province.He 3 an idea for hybridizing rice in the 1960s. Since then, he has 4 himself to the research and development of a better rice breed. In 1964, he 5 to find a natural hybrid rice plant that had obvious 6 over others. Greatly 7 , he began to study the elements of this particular type. In 1973, in 8 with others, he was able to cultivate a type of hybrid rice species which had great advantages. It yielded 20 percent 9 per unit than that of common ones.The next year their research made a 10 in seeding. They successfully 11 a set of technologies for producing indicarice, putting China in the 12 worldwide in rice production. For this 13 , he was dubbed the Father of Hybrid Rice.At present, as many as 50 percent of Chinas total 14 fields grow Yuan Longpings hybrid rice species and yield 60 percent of the rice 15 in China. 16 Yuans hard work, Chinas total rice output 17 from 5.69 billion tons in 1950 to 19.47 billion tons last year, about 300 billion kilograms more h ave been produced over the last twenty years. The annual yield increase is enough to 18 60 million people.The Super Rice Yuan is now working on yields are 30 percent higher than those of 19 rice. A 20 yield of 17,055 kilograms per hectare was registered（登记） in Yongsheng County in Yunnan Province in 1999.1. A worker B scientist C teacher D graduate2. A studying B working C teaching D rice3. A came up with B caught up with C kept up with D got along with4. A developed B devoted C made D contributed5. A happened B seemed C occurred D addicted6. A benefits B advantages C profits D uses7. A forced B defeated C encouraged D convinced8. A team B group C couple D cooperation9. A more B less C little D few10.A development B breakthrough C breakdown D progress11.A brought B studied C developed D promoted12.A front B back C middle D lead13.A achievement B discovery C invention D progress14.A wheat B plant C rice D cotton15.A produce B production C product D promise16.A Result in B In terms of C In case of D Due to17.A rose B raised C grew D arose18.A save B feed C cure D treat19.A particular B special C common D usual20.A level B dream C rice D record导读：本文围绕袁隆平发明杂交水稻的历程展开描述。【解析】1.D graduate(毕业生)。他从西南农业学院毕业。2.C 后面的at an agriculture school，说明他开始从事教学（teaching）生涯。3.A come up with“提出想法”。4.B devote oneself to“献身于.”。5.A happen to do“碰巧.”。6.B have advantage over“比.有优势7.C 受到极大鼓舞（greatly encouraged）,他开始.。8.D in corporation with others “与他人合作”。9.A 产量比普通（common）水稻高20%。10.B make a breakthrough“取得突破”。11.C 此处的develop的含义“开发，研究出”。12.D put China in the lead worldwide“是中国处于世界领先地位”。13.A 因为这项成就（achievement）,他被尊为“水稻之父”。14.C Chinas total rice fields“中国所有的稻田 ”。15.B the rice production in China.“中国的水稻产量”。Production“产量”。16.D 由于（due to）他的努力，中国的睡到出口从5.69 billion tons 上升（rise）到19.67 billion tons.17.A 同上。18.B feed“喂养，养活”。19.C 这种超级水稻比普通（common）水稻产量高30%。20.D 创造了一个年产17,055 kilogr