Question

下列句子均有一处错误（或多一词；或缺一词；或错一词），请找出并加以改正。

In the Bronze Age, they made copper and bronze, but iron came later, in which was called the Iron Age.

 

Answer 1

答案：
解析：

which→what。因为该定语从句没有先行词，因此要用关系代词what来引导。