问题补充:
I think this is the very work that we must finish her.
A. to help
B. help
C. helping
D. helped
答案:
(答案→)A. to help
B. help
C. helping
D. helped
解析:句中空格处填的动词help 并不是 finish 的宾语,正确的句子分析是:that I must finish 是修饰名词 the very work 的定语从句,finish 的宾语是引导该定语从句的关系代词 that,其后的不定式 to help her 是目的状语。