My grandfather is as ________ as a young man and hates sitting around doing nothing all day.

My grandfather is as ________ as a young man and hates sitting around doing nothing all day.

A.enthusiastic

B.energetic

C.talkative

D.sensitive

答案及解析： B

解析：

enthusiastic意为“热情的”；

energetic意为“充满活力的”；

talkative意为“健谈的”；

sensitive意为“敏感的”。根据句意应选B项，表示“我爷爷像年轻人一样充满活力，不愿意整天坐着无所事事”。