填空题 Moreover, because mothers are much more likely than fathers to take time off from work to care for their children, women workers, as a group, fall permanently 1 male workers in terms of pay, benefits and seniority.
【正确答案】
【答案解析】behind[解析] fall为不及物动词，后接宾语时要与介词搭配使用。fall behind为固定搭配，“落后”。