—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．workedB．was working
C．would workD．would have worked
B
答案　B　[句意：——昨天我們?nèi)ヒ按锻娴梅浅８吲d。遺憾的是你沒去�！艺娴膽�(yīng)該和你們一起去，但我一直在解決剩下的那些問題。C、D兩項(xiàng)可直接排除；A項(xiàng)表示過去的習(xí)慣性動作，也被排除。B項(xiàng)表示“ 過去一直在做某事”，符合題意要求。]
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