问题
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
B:had arrived; didn’t turn up
C:arrived; hadn’t turned up
D:had arrived; hadn’t turned up
正确答案是：
