A.Howdoyouwanttomailitbyair?您打算怎么寄?
B.Howwouldyouliketomailthem?您打算寄航空吗?
C.Byairmail?是寄航空吗?
D.Doyouwanttomailthembysurfacemailorbyairmail?您想按水陆路邮寄还是按航空邮寄?