单选题 They are no longer on speaking terms because she ______ his confidence.
【正确答案】 D
【答案解析】[解析] 各选项的意思是：exposed曝光，显露，揭露；destroyed破坏，毁灭，消灭；proved证明，检验；betrayed背叛，泄露。be not on speaking terms意为“不再说话”。根据句意可知，答案是D。