问题
选择题
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
答案
答案：B
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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
答案：B