Science has made() possible for machines to take the place of human labour.

问题描述:

Science has made() possible for machines to take the place of human labour.
A、this B、that C、its D、it
选哪一个,请解释清楚,

答案:D
it在此作形式宾语,真正的宾语是后面的动词不定式结构.而this或者that都不能作形式主语或者形式宾语,所以排除.its是形容词性物主代词,后须接名词.