问题补充:
It is in their ability to speak humans from animals.
A. which;differ
B. that;different
C. which;different
D. that;differ
答案:
A. which;differ
B. that;different
C. which;different
(答案→)D. that;differ
解析:考查强调句型和固定词组。强调句型:it is/was被强调成分that/who其它成分。强调句型最大的特点是把it is/was…that/who…去掉,句中仍然是对的。本题第一空正是强调句型,强调的是in their ability to speak,第二空是固定词组differ from…与…不同。句意;正是在说话的能力父母,人们区别与动物。故D正确。