问题
选择题
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
答案
答案：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.