问题描述：
chose the right answer
Such is ______human nature that many people don't value_______things they have until they've lost them.
A a;不填 B 不填；the C the;不填 D a;the
请陈述选择理由.
Such is ______human nature that many people don't value_______things they have until they've lost them.
A a;不填 B 不填；the C the;不填 D a;the
请陈述选择理由.
问题解答：
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