I could have offered you some help last weekend but I with my work at that time.A. would

问题补充：

I could have offered you some help last weekend, but I with my work at that time.

A. would be occupied

B. was occupying

C. had been occupied

D. was occupied

答案：

A. would be occupied

B. was occupying

C. had been occupied

(答案→)D. was occupied

解析：考查时态：句意：上个周末，我本来可以帮助你的，但是当时我在忙于工作。从前面的句子可知是过去的虚拟，but后面是过去的事实，用一般过去式，be occupied in忙于，选D。