The speed ___light travels is very high.A which B at which C in which D with which

问题描述:

The speed ___light travels is very high.A which B at which C in which D with which
为什么选B呢?我记得以前说是速度时是用in啊,我觉得应该选C啊,为什么呢?有谁会,

以……的速度 at the speed of
这个题是个定语从句,所以根据搭配应该是B