单选题10. Your business cards arrived this morning, but there was a problem with the color and we've demanded the printer re-print them at their ______.
【正确答案】
D
【答案解析】 选项A错误，to do something at one's convenience意思是“在某人方便时做某事”，但句意暗示名片马上就被要求重印了。选项B错误，experience意思是“经验”，重印名片不需要“经验”。选项C错误，salvation意思是“拯救，救助”。选项D正确，at one's expense意思是“由某人付款”，名片颜色不对是质量问题，应该由印刷者自负重印成本。