单选题 Although he has become rich, he is still very ______ of his money.
A. economic B. thrifty C. frugal D. careful

【正确答案】 C

【答案解析】[解析] 形容词辨析题。be frugal of意为“节俭，节约”；economic意为“经济的，经济学的”，但be economical of可表达“节俭的”的意思；thrifty是“节俭的”的意思，常与with搭配；be careful of意为“仔细，小心”，与句意不符。根据句意应选C：frugal。