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
问题
But too much of that lengthened experi
参考解析：
[解析] 很多经验表明，即使在富饶的西方，也有贫穷和被忽略的经历，除非我们能为此做些什么。依题意选B。
分类：其他
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