Social workers have opened hotlines to offer free ________ to those in need, especially to the teenagers.

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1. (2020·建邺模拟) Social workers have opened hotlines to offer free ________ to those in need, especially to the teenagers.

A . systems B . services C . symbols D . stations

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江苏省南京市建邺区2020年九年级中考英语一模试卷