短文改错。

    Jim Green teaches our ____ English. He has been in China for more than two year____. He has been to many interesting places in Beijing, and____  he has not yet been to many others ____ parts of China. Last week he goes ____ to Mount Emei in Sichuan Province with his family. Many people like travel ____ by air, but Jim ____ family think that traveling by train is the best. It is much cheap ____ and far more enjoyable than a rushing trip by air. He ____ had a wonderful train ride to Chengdu after ____ they went to Mount Emei by bus.

20世纪50年代，苏联科技人员发明了连续铸钢法，铸出的钢锭比传统方法质地均匀，且能将产量提高1/10到1/5，因而被28个国家买去专利。但直到1980年，苏联自身只有11％的钢锭采用此项技术生产。对材料解读最准确的是（   ）

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