问题补充：
- Has John arrived yet?
-- No, she an hour ago.
A. was supposed to come
B. must have come
C. should come
D. ought to have come
答案：
A. was supposed to come
B. must have come
C. should come
(答案→)D. ought to have come
解析：考查虚拟语气。句意：约翰已经到了吗？——不，他应该一个小时后到达。“ought to+have+done”表示过去应该做而实际并没有做，译成“理应做……”，往往表示遗憾。故选D。
