An exporter cannot receive payment until the goods on consignmen

An exporter cannot receive payment until the goods on consignment ______ sometime in the future.
A、have offered for sale
B、are quoted
C、arrived at destination
D、have been sold
【正确答案】：D
【题目解析】：表示事情已经完成要用现在完成时；句意：出口商要等到寄售的货物在将来某个时候售出后才能收到货款。