单选题 The factory operated ______ until the order was filled.
【正确答案】 D
【答案解析】[解析] 那家工厂昼夜不停地赶工,直到把定的货物赶出来为止。
本题考查短语辨析。at times有时,偶尔;to the minute一分不差,恰好;day by day一天天,逐日;around the clock夜以继日地,连续一整天。故选D。