My grandfather is as ________ as a young man and hates sitting a

My grandfather is as ________ as a young man and hates sitting around doing nothing all day.
A、enthusiastic
B、energetic
C、talkative
D、sensitive
【正确答案】：B
【题目解析】：energetic 精力充沛的；句意：我祖父像年轻人一样精力充沛，他讨厌整天无所事事。