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：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”。