No, I don't know the room number.

不，我不知道房间号。

I looked down the hallway to room number nine.

我沿着走廊向9号房间看过去。

Room number nine was at the far end of the corridor where it turned sharply to the right.

9号房间在过道尽头右急转弯处。

I don't know the room number.

我不知道房间号码。

Please tell me your room number.

请告诉我您的房间号码。