单选题All of the guests __

问题补充：

单选题Alloftheguests___________by9o’clock,butthehost_____________until15minuteslater.A.arrived; didn’t turn upB.had arrived; didn’t turn upC.arrived; hadn’t turned upD.had arrived; hadn’t turned up

答案：

B解析本题对过去发生的动作的陈述，客人的到来发生在主人的到来之前。故选B