第20题: [单项选择]His failure to pay his debts ______ their suspicion that he was not to be trusted. A. convinced B. confirmed C. checked D. tested 参考答案:B 答案解析:[解析] confirm“加强”;check“检查”;test“测验”;convince sb.of/that“使某人相信”。
第21题: [单项选择]对溃疡性结肠炎最有价值的诊断方法是 A. 临床表现 B. 便常规 C. X线钡剂灌肠 D. 血清α2球蛋白测定 E. 结肠镜检查 参考答案:E