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问题: 一个完型选词

They were not involved in any education or training and were unemployed,underemployed,or even homeless.

想请问一下,最后一个词 homeless 为什么不选 harmless ?

解答:

因为俩词不是一个意思啊

homeless是没有home, 无家可归
harmless是没有harm, 毫无威胁