He usually works five days a week from Monday to Friday.Sometimes he woks on Saterdays ( )Sundays.
问题描述：
He usually works five days a week from Monday to Friday.Sometimes he woks on Saterdays ( )Sundays.
是填and还是or?
答
on Saturday （ and ）Sunday 在周六和周日
相当于 at the weekends 在周末
祝开心!