【题目】—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
在线课程【答案】B
【解析】根据对话中的内容，可知道第二个说话的人当时是正在处理一些问题，故用过去进行时，可知此题应选B。