单选题 Although he had done many great things, he never felt it necessary to ______ his achievements.
A. lavish B. extravert C. impose D. vaunt

【正确答案】 D
【答案解析】[解析] lavish“浪费，滥用，慷慨给予”；extravert“使思想外倾”；impose“征税，强加”； vaunt“自夸”。