I sooner but I didn’t know that they were waiting for me .A. had comeB. was comingC. woul

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A. had e
B. was ing
C. would e
(答案→)D. would have e
解析：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。