Question

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

1. A.
   with which
2. B.
   to which
3. C.
   of which
4. D.
   for which

Answer 1

B
to a degree有點(diǎn)，稍微。句意為：人的面部表情與動(dòng)物的不一樣，他們可以故意地稍微控制一下。