下面哪个句子是混合虚拟语气结构? A.If I had worked harder, I would have passed the examination. B.If I were you, I would not fail. C.If I were to be a NBA super star, I would help Chinese basketball players to improve their skills. D.If he had worked harder three years ago，he would be in college … 阅读详情>> "下面哪个句子是混合虚拟语气结构?"