when were you air the room yesterday?

when were you air the room yesterday? Why were you air the room yesterday?改错 一道改错题~when were you air the room yesterday?我找了很久都没有看出来,如果有答案 i brought it to you when you were in the reading room yester we were in the room yesterday分别对yesterday、in the room 、we提问 What were you doing when I phoned you yesterday evening? You open the window and air the room.(改成祈使句) Were you in the classroom yesterday? Were you in the supermarket yesterday? What were you doing yesterday afternoon when I was watching when i phoned yesterday,your brother _______me you were out The windows were never opened except to air the room for a f