Question

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

Answer 1

B

解析:

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”。