In fact___is a hard job for the police to keep order in such an important football match

问题描述:

In fact___is a hard job for the police to keep order in such an important football match
A.it B.there C.that D.this 为什么选A

it 作形式主语,用来替代to keep order in such an important football match,避免头重脚轻原句应该是 To keep order in such an important football match is a hard job for the police