She would love to have gone to the party but she extra hours to prepare for a meeting.A.

问题补充：

She would love to have gone to the party, but she extra hours to prepare for a meeting.

A. had to work

B. had worked

C. could work

D. would have worked

答案：

(答案→)A. had to work

B. had worked

C. could work

D. would have worked

解析：would love to do表示“将来愿做……”，would love to have done表示“过去原本想做……，但没有做到”，根据第一分句中的这一结构可知，事情应发生在过去，所以but后的分句时态应用一般过去时。