题目内容：

she showed her visitors around the museum ,the construction of which has taken more than three years 为什么要用of which

优质解答

她带着游客在博物馆参观,这个博物馆用了三年多的时间才建好.用of which是因为在这种非限制性定语从句中,which指代前面的博物馆,这个句子也可以写成she showed her visitors around the museum .the construction of ...