单选题
Ms. Rice, with customary class, simply expressed hope that this episode wouldn't ______ the charity in spite of the previous scandals.
【正确答案】
A
【答案解析】[解析] 本题中，A项“taint使腐败，使污染，弄脏”符合题意，如：Bad books will taint the young mind. (坏书会毒害年轻人的思想。)其他三项“B项enhance提高；C项sprain扭伤；D项sponsor发起，主办”都不正确。因此A项为正确答案。