题目内容
It is in their ability to speak ______ humans ______ from animals.
| A．which; differ | B．that; different | C．which; different | D．that; differ |
D
解析试题分析：考查强调句和词组：第一空考查的是强调句，强调句结构是：It is+强调部分+that…，这里强调的是in their ability to speak，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D。
考点：考查强调句和词组
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