题目内容：
But too much of that lengthened experience，even in the wealthy West，will be experience of poverty and neglect，______we do something about it.
A. when
B. Unless
C. because
D. if
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：But too much of that lengthened experience,even in the wealthy West,will be expe
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- 题目类型：选择题
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