Most of us found difficult to finish the work in such a short time.A. thisB. whichC. what

问题补充：

Most of us found difficult to finish the work in such a short time.

A. this

B. which

C. what

D. it

答案：

A. this

B. which

C. what

(答案→)D. it

解析：考察it作为形式宾语。英语指能作为形式主语或者形式宾语的只有it。本句指的it是形式宾语，真正的宾语是后面的不定式to finish the work in such a short time。句意：我们指的大部分人都认为在如此短的时间里完成这份工作是很困难的。故D正确。