问题
选择题
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
答案：D
题目分析：句意：要不我早来了，但是我不知道他们在等我。But后的内容可知我不知道他们在等我，因此我也没有早来。But后是真实的事实，相当于一个条件。But前是对过去的虚拟，对过去的虚拟主句应该用would have done，根据句意故选D。