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

    A. with whichB. to whichC. of which D. for which

    【答案】B

    【解析】

    试题分析：句意：在控制力方面，人类的脸部表情与动物的脸部表情不同。in the degree to which they can be controlled表示范围，是状语。其中 to which they can be controlled是定语从句，修饰degree，to a degree“在某种程度上”，故选B。

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