问题补充:
I sooner but I didn’ t know that they were waiting for me.
A. had come
B. was coming
C. would come
D. would have come
答案:
A. had come
B. was coming
C. would come
(答案→)D. would have come
解析:考查虚拟语气。句意为“我本来可以早点来,但我真不知道他们在等我。”but I didn’ t know表示了过去时间,因此前句是对过去情况的虚拟,用主语+should / would / could / might + have done表达,故选D。