问题描述：
human being are different from animals _____ they can use language as a tool to commumnicate.
human being are different from animals ___ they can use language as a tool to commumnicate.
a in that b for that c in which d for which
human being are different from animals ___ they can use language as a tool to commumnicate.
a in that b for that c in which d for which
问题解答：
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