The light is on—s____must be in the office怎么填

The light is on—s____must be in the office怎么填 The light is on.must be in the office.添适当 1.the light in the office is still on.someone must be still The light in the office is still on. ——Look,the light in the teacher's office is still on.Miss Li The light is on.There must be someone in the office?请各位不要所问非 The light is still on in Mr Zhang's office中怎么有两个介词?on in? The light in the office is off．The teacher ________ be there The light in the office is still on. ---- Oh,I forgot___. A. The light in the office is still on.-----Oh,sorry.I forgot() 初中英语look!the light in the teacher's office is on .there must --Look,the light in the teacher's office is still on.Mr Li i