prep中一道语法题，which的指代

daier

Scientists say that each of the photographs taken of the Ares Vallis plain by the Mars Pathfinder indicate the overwhelming extent to flooding on the planet billions of years ago and the degree that rocks were scattered by its force.



(A) indicate the overwhelming extent to flooding on the planet billions of years ago and the degree that

(B) indicate that the extent of the floods on the planet billions of years ago was overwhelming and the degree to which

(C) indicate the overwhelming extent of the floods on the planet billions of years ago and the degree to which

(D) indicates the overwhelming extent of the flooding on the planet billions of years ago and the degree to which

(E) indicates the overwhelming extent to flooding on the planet billions of years ago and the degree that


答案：D

D中的the degree to which，which是指代什么的？在这句话中的语法成分是什么？

sayysong

简化句 each ... indicates ... the extent ... and the degree ...
the degree to which rocks were scattered by its force 中to which 是介词引导的定语从句修饰degree，其中which就是指的这个degree。
白勇语法书中提到过，类似的好像还举了几个例子...an age in which ...; a phenomenon in which...等等。

daier

恩呢，恍然大悟，谢谢！！