【题目】I did better, but I still wasn't as focused as I ________.
A.should doB.should have been
C.should beD.should have done
在线课程【答案】B
【解析】
考查虚拟语气。句意：我做得更好了，但我仍然没有像我应该的那样专注。根据句意和did better可知表示对过去的虚拟语气，排除A、C选项；should have done意为"本应该做某事而没有做"，且根据短语be focused on“集中于；专注”，故选B。