单选题 In today's rapidly changing economy, opportunities ______ for those who are motivated and dedicated to achieving their career goals.
A. abound B. refrain C. transcend D. uphold

【正确答案】 A
【答案解析】[解析] abound多，富于；refrain避免，抑制；transcend超越，胜过；uphold支持，赞成。