单选题 He was working in Africa and was considered by the company as the best manager at collecting ______ and making money.
【正确答案】 A
【答案解析】ivory象牙；irony反语，冷嘲；嘲弄；inventory详细目录，存货清单；levy征税；税款。句意：他在非洲工作，公司认为他是收购象牙赚钱的最佳经理。