【Lucas Chou】評論
關係代名詞that, 如果前面有the only, the same, the vary, the first, ALL, on, little, much, none, any, every 時。較常用 THAT. Ex. 1. He was the only man that I saw in that room. Ex. 2. His writing contains little that is new, but much that is old. 他的寫作內容少有新意，大多是陳腔濫調。
【Wen Xuan Xie】評論
all 為先行詞...what本身兼先行詞與關代...