18. It never occurred to me _____ you could succeed in persuading him to change his mind.
18. It never occurred to me _____ you could succeed in persuading him to change his mind. (D) A. which B. what C. that D. if 2010年全国陕西卷 答案是D 请解释一下C与D 我个人认为C是对的。翻译过来也很通。但若用if,翻译为:我从未想到是否你能成功说服他改变主意。这样反倒是个病句。实在解释不通。寻求高手解答!!