Human facial expressions differ from those of animals in the degree ______ they can be controlled on

题目简介

Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.

A．with which

B．to which

C．of which

D．for which

题型：单选题难度：中档来源：不详

to which引导定语从句；which指代先行词animals,表示“对它们来说”；with which 意为“和……在一起”；of which 意为“其中”；for which 意为“为了”。