第19题: [单项选择]They ______ the work in spite of the extremely difficult conditions. A. carded on B. carded off C. carried out D. carried forward 参考答案:A 答案解析:[考点] 动词短语辨析 [解析] carry on意为“继续”;carry off意为“成功应付(困难)局面”;carry out意为“执行、完成”;carry forward意为“推进,使前进