Modern science and technology has ___ munication between people far apart.
A.made convenient
B.made it convenient
C.made it convenient for
D.made it convenient to
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A解析题目中has made是谓语，munication between people far apart短语是宾语，convenient是宾语的补语，被前置。如用B项,it是形式宾语代替不定式或从句。