Complete the sentences with in, at, on: I wasn’t sure whether I had come to the right office. There was no name………... the door.

I wasn’t sure whether I had come to the right office. There was no name……on…... the door.

Dịch: Tôi không chắc liệu mình đã đến đúng văn phòng hay chưa. Không có tên trên cửa.