【单选题】If workers in a factory, hospital etc work shifts , they work for a particular period of time during the day or night, and are then replaced by others, so that there are always people working. "Shift"...
【单选题】if workers in a factory, hospital etc work shift s, they work for a particular period of time during the day or night, and are then replaced by others, so that there are always people working shift me...