单选题 In order to extend a commercial license in the district, business owners are required to present their old ______ and pay a renewal fee of $1,000 to the Business Authorization Agency.
【正确答案】 D
【答案解析】[解析] 名词词汇
根据上下文语义，此处表示“出示之前的许可证，并支付更新费用”，故应选名词D. permit(许可证)。A. consent表示“同意”，B. patent表示“专利权”，C. treaty表示“条约”。