Question

英语语法：A modern city has been set up in ____ was a wasteland ten years ago. A. what B. which

请问which错在哪里？what和which的选择该如何判断？

Answer 1

which是关系代词，前面必须有一前行词，This is the banana which I bought yesterday. 这里的前行词就是banana，前行词必须在which前面，前行词和which必须相邻， 而你的句子没有前行词，这是第一，第二,which在从句中做语法上的主语或宾语，这点你的句子没有问题。如果把你的句子改为 A modern city has been set up in the place __ was a wasteland ten years ago. 加个前行词，the place，用which是可以的。

换句话说，in是介词，后面肯定要跟名词性的词，做介词的宾语，而加了which就没有这个名词性的词了。

再说what， what = the place which，就是说what=前行词+关系代词， 所以不需要前行词，语法上管what叫名词性关系代词，名词性就是说what本身已经代替前行词了，而关系代词是说它还代替了which。所以叫名词性关系代词。

总之，what = 前行词 +which

追问

in which on which at which with which
是有的。。。

追答

那which的前行词在哪里？

Answer 2

应选择what，如选which，which指代的a modern city 是先行词，句意说不通