问题补充：
We at the airport; otherwise we would have arrived home by lunch time.
A. had delayed
B. were delayed
C. had been delayed
D. have delayed
答案：
A. had delayed
(答案→)B. were delayed
C. had been delayed
D. have delayed
解析：句意：我们在机场被耽搁了，否则我们到午餐的时候，就可以到家了。根据we would have arrived home by lunch time.可知这是对过去的事情的虚拟，前面的句子是过去的事实，而且we和delay是被动关系，所以选B。
