问题
选择题
It is in their ability to speak ______ humans ______ from animals.
A．which; differ
B．that; different
C．that;differ
D．which;different
答案
答案：C
第一空考查的是强调句，第二空考查动词differ from“于…不同”，句意是：人类和动物的不同在于他们说话的能力。选C。
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