单选题
They ______ the work in spite of the extremely difficult conditions.
A. carried on B. carried off C. carried out D. carried forward
【正确答案】
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”。其中，off，out，forward在这里为副词，名词要放在动词和副词之间，只有carry on既可说early sth on，也可说carry on sth，故选A。