语法与词汇 75.His wife says that he was more frugal in his youth than later years.

【正确答案】 C

【答案解析】frugal的意思是“节俭的，朴素的”，thrifty“节约的”与之相符。listless“倦怠的，情绪低落的”；robust“精力充沛的”；gullible“易受骗的”都不正确。故选C。