— We all had a lot of fun at the barbecue yesterday.Pity you weren’t there.—I really shou

问题补充：

— We all had a lot of fun at the barbecue yesterday.Pity you weren’t there.

—I really should have gone with you,but I on some remaining problems.

A. worked

B. was working

C. would work

D. would have worked

答案：

A. worked

B. was working

C. would work

D. would have worked

解析：考查动词的时态。并列句but部分交待的是

事实不能用虚拟语气。根据句意可知，昨天“我”没有去参加烧烤，是因为“我”当时正在处理一些问题，因此用过去进行时。