问题补充:
He was very busy yesterday,otherwise heto the meeting.
A. would come
B. came
C. would have come
D. had come
答案:
A. would come
B. came
(答案→)C. would have come
D. had come
解析:otherwise用来表示一种含蓄的虚拟假设,因为是对过去(yesterday)的情况的假设,所以应该用would have come形式。