These scientists,however,are cautious about the extent to which a_其他解答

These scientists,however,are cautious about the extent to which animals can be credited with conscious processing.
这个应该是定从吧,但是不太明白extent后那个to是什么成分呢?

人气：311 ℃　时间：2020-04-13 05:56:32

解答

这个to 是extent带来的~是个介词!
to (what) extent 是固定搭配,表示到达什么程度~
是定语从句~