第6题: [单项选择]Their confidence in him was greatly ______ by his prolonged hesitation before taking any action. A. appreciated B. confirmed C. undermined D. cherished 参考答案:C 答案解析:(undermine削弱……的基础,逐渐损害)。句意为:由于他在采取行动之前长时间地犹豫不决,他们对他的信心大大地减弱。A.appreciate欣赏;B.confirm批准,进一步证实;D.cheri