Though my grandfather is in his eighties he is still as as a young man and hates sitting

问题补充：

Though my grandfather is in his eighties, he is still as as a young man and hates sitting around doing nothing all day.

A. enthusiastic

B. talkative

C. energetic

D. sensitive

答案：

A. enthusiastic

B. talkative

(答案→)C. energetic

D. sensitive

解析：本题的含义是虽然我的祖父有80多岁了，但他仍然和年轻人一样精力充沛，不喜欢整天坐着什么事都不做。energetic表示精力充沛的意思，故本题选C。