The room, which window faces the south, is the nicest one of all on this floor.

【参考答案】

which应改为whose。[解析] 句意：窗户朝南的房间是这一层楼中最好的。此处指代room的关系词和window是所......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)