You have my word that you shall have the certificate before you _____ this summer.[ ]

A. have graduated

B. graduate

C. will graduate

D. will have graduated

商户交易凡是通过银联交换中心的，（交易手续费收入按照8：1：1原则分配，收益的80％归发卡行、10%归收单方、10％归银联。