单选题 Please make sure that your L/C will reach us well before the shipment month so that we can ______ shipping space for the goods with ABC Line.

【正确答案】 D

【答案解析】[解析] 句意：请确保你方信用证在装船月之前交给我方，以便我们能够在班轮上留下装货空间。retain付订金预留；保持。book登记；预约。preserve为防止损害或变质的保存。conserve保存自然资源，保存人的精神和精力。