【题目】I was wearing a seatbelt. If I hadn't been wearing one, I ____.
A.were injured
B.would be injured
C.had been injured
D.would have been injured

【答案】D
【解析】 句意：我当时系着安全带。如果我没有安全带，我就会受伤。使用虚拟语气，根据if条件句用的had done，可知，主语用would have done表示对过去情况的虚拟，而且I和injure是被动关系。故选D。