My father/ not/ at the office/ the day/ before/ yesterday.17/18My father/ not/ at the office/ the day/ before/ yesterday.My father is not at the office the day before yesterday.My father wasn’t at the office the day before yesterday.My father hadn’t been at the office the day before yesterday.My father hasn’t been at the office the day before yesterdayGiải thíchĐáp án đúng: B Dịch: Bố tớ không ở văn phòng vào ngày hôm