单选题 It is difficult to {{U}}refute{{/U}} his argument in our routine debate.
【正确答案】 C
【答案解析】[分析] 动词辨析 refute表:驳倒,反驳;A.analyze分析,分解;B.ponder沉思,考虑;C.disapprove不赞成;D.ignore不理睬,忽视;因此C为答案。