【正确答案】 C

【答案解析】[注释] 词义搭配。uphold(=support or approve)支持，赞成：I cannot uphold such conduct．(我不能赞成这样的行为。)本题中upholding是现在分词作定语。如选 upholding，可满足上下文的词义和结构要求。abandon vt．(=give up because of being useless)放弃，丢掉，废弃，如：1)an abandoned car(一辆废弃的汽车)2) He has abandoned his original beliefs． (他已抛弃了原来的信念。)3)He abandoned his wife and children and went abroad．(他抛弃妻子和孩子，出国了。) confirm vt，(确认，证实)与上下文句意不符，不能入选。upgrade(＝raise to a higher grade)提高……的等级，与上下文句意不符，不能入选。