doing exercise is good for our health,not only I but also my old grandfather____every morning

题目

doing exercise is good for our health,not only I but also my old grandfather____every morning
Aexercise Bexercised Cexercises Dare exercising

答案

not only … but also 连接两个主语时,谓语动词要和与其最近的主语保持人称和数的一致 所以选A