Nam class third floor3/15Choose the letter A, B, C or D to complete the sentences with given words Nam/ class/ third/ floor.Nam’s class is on the third floor.Nam class is on the third floor.Nam’s class is in third floor.Nam’s class is in the third floor.Giải thíchĐáp án: A Giải thích: on the+ số thứ tự+ floor: Ở tầng mấy Dịch: Lớp của Nam nằm ở tầng ba