I think __ impossile for him ___ the work without any help.A it;finishes B that;to finish

问题描述:

I think __ impossile for him ___ the work without any help.A it;finishes B that;to finish
C this;finishing
D it;to finish

D
it 做形式宾语
真实宾语后置,用动词不定式表现是不是impossile应该有be 动词呀 题有问题吗?没问题如果前面没有i think由it做形式主语的话 那就应该有be