【题目】______ made the dining room extra special is its polished wooden floor.
A. What B.That C.Who D. Which
在线课程【答案】A
【解析】
试题分析：句意：使饭厅额外特别的是其光滑的木地板。主语从句______ made the dining room extra special的空白处缺少主语，结合句意可知是物作主语，在主语从句中What可以做主语，代物；Who可以做主语，代人；Which选择某物；That只起连接作用，不做句子成分，故选A。