是on weekdays还是on weekday?

on weekdays还是at weekdays 是on weekdays还是on weekday? 后天期末on weekdays 还是in weekdays?in the weekends 在周末英语怎么说是on weekends还是at weekends.在工作日是on weekdays吗? weekdays 前面用 on 还是用 in 还是用 at weekdays的前面究竟是用介词on还是at,急! at weekdays和on weekdays有什么区别?该怎样用? We are busy on weekdays.翻译 I go to school on weekdays是什么意思 My parents are b_ working on weekdays. why do not you go out and play soccer with us?的同意句...＿（2个空只能填两个单词-_-!）go out and play soccer with us?还有一个问题...是in weekdays还是on weekdays？ 求答:The supermarket is too c_____ on weekdays.括号里面填crowd还是crowded My mother goes to work on weekdays.（就画线部分提问）goes to work是画线部分 （ )( ) your mother ( ) on weekdays? They go to school on weekdays.（On Sunday） I walk to the supermarket on foot on weekdays改错 求on weekdays的同义词 以及on weekends的同义词 we often look ____(comfortable) on weekends than on weekdays He usually goes to school on weekdays(on weekdays用tomorrow改写此句)怎么写