单选题Modern science and techno

问题补充：

单选题Modernscienceandtechnologyhas___communicationbetweenpeoplefarapart.A.made convenientB.made it convenientC.made it convenient forD.made it convenient to

答案：

A解析题目中has made是谓语，communication 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。