Do you think_________easy for them to finish the work in time.

问题描述:

Do you think_________easy for them to finish the work in time.
A,this B,that C,it D,its
可可可--是 why?

这是固定句式 think it+adj.+to do sth.
it作形式主语,真正的主语是 to finish the work in time