单选题 She worked hard at her task before she felt sure that the results would ______ her long effort.

【正确答案】 A

【答案解析】[解析] 本题中justify证明是正当的；testify作证，证明；rectify纠正，校正，调整；verify证实，检验，查证，核实。根据题意，应选A。句意是：她工作勤奋，坚信劳动成果将证明她长期的努力是正确的。