There is no greater love than who devotes his whole life 　mankind.A. that of a man; to b

问题补充：

There is no greater love than who devotes his whole life mankind.

A. that of a man; to benefiting

B. a man; to benefiting

C. that of a man’s; benefits

D. a man’s love; in benefiting

答案：

(答案→)A. that of a man; to benefiting

B. a man; to benefiting

C. that of a man’s; benefits

D. a man’s love; in benefiting

解析：

根据固定搭配devote…to…中的to是介词，后面要接名词、代词或动名词，排除C和D；再根据比较对象应当是love与love相比，所以只有A正确，that在句中替代love。