填空题 He was the only one of the candidates who were to carry out his campaign pledges.
【正确答案】
【答案解析】were应改为was[解析] 本题考查主谓一致。后面定语从句的先行词为the only one of…，因此谓语动词只能用单数形式。句意：他是候选人中唯一一个能履行竞选承诺的人。