All of the guests by 9 o’clock , but the host until 15 minutes later .
A. arrived ; didn’t turn up
B. had arrived ; didn’t turn up
C. arrived ; hadn’t turned up
D. had arrived; hadn’t turned up
网友回答
A. arrived ; didn’t turn up
(答案→)B. had arrived ; didn’t turn up
C. arrived ; hadn’t turned up
D. had arrived; hadn’t turned up
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