The photographer insisted on going to Iraq, though many people warned ________．
A.him not goingB.his not goingC.him didn’tD.him not to在线课程D
解析：
“警告某人……”这个词组可以有几种不同的翻译：warn sb not to do sth，warn sb against sth，warn sb of sth等。在这句句子中因为动词不定式中的动词go在上句中已经出现过了，所以被省略。