You've been so helpful! How can I make up to you ?
【正确答案】 A
【答案解析】解析:习惯搭配。代词应放在make和up的中间,因而排除C、D。make it up to sb.补偿某人的损失、遭受的不幸或花费的钱财:Thanks for buying my ticket—I’ll make it up to you later.感谢你给我买了票——我稍后再还给你钱。make sb.up表“为某人化妆”:She spent an hour making herself up before the party.她在聚会前化妆用了一个小时。