问题
选择题
The old scientist took up walking as a regular form of exercise, which, of course, is of great to his heath.
A．benefit
B．favor
C．sense
D．relationship
答案
答案：A
题目分析：考查名词。benefit 此处用作抽象名词，意思是“益处；好处”；be of benefit to...“对……有好处”。句意：这位老科学家以步行作为一项经常性的锻炼方式，当然，对他的健康有很大的好处。故A正确。