单选题 Speaker A: I sent a package to Dallas two days ago and it still hasn"t arrived. My tracking number is 641-24.
Speaker B: OK, Mr. Smith. ______, but our delivery person said that there was no such address.
【正确答案】 D
【答案解析】[解析] 根据对话可知，说话者A在向说话者B询问，为什么自己两天前寄往达拉斯的包裹到现在还没有到。由说话者B的回答“我们的快递员说这个地方不存在”可推测出前面的内容应为“我们尝试过投递包裹”。故选D。