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Space exploration has been made ______ with the development of modern science and technology.

A. it possible    B. it was possible  C. that possible                 D. possible

C


解析:

该句测试是make sb./ sth.+adj. 结构,如果用A项,后应用to do sth.,因为it是形式宾语,代替不定式。

With the development of modern science and technology, man has made space exploration possible.

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