Spaceexplorationhasbeenmade______withthedevelopmentofmodernscienceandtechnology.
A.it possibleB.it was possibleC.that possibleD.possible在线课程C
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.