improve their working conditions最后为什么加s

improve their working conditions最后为什么加s their working conditions ( )the same ( )before The manager has ____to improve the working conditions in the ————has been done to improve the working conditions. ______has been done to improve the working conditions A,a lo good working conditions 英语翻译they spend all their working lives in conditions which w 为什么in their opinion中的opinion不加s? the children cooperated with their teachers 为什么teacher加s in their house house为什么不加s Women lie about their age, men lie about their income为什么不加s. Working conditions will be ______ a lot.