试题题干
Countries of the world are（ ）by the World Bank into three categories of high-income, middle-income and low-income economies.
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试题解析
本题考查根据原文内容选择合适的词。
Countries of the world are divided by the World Bank into three categories of high-income, middle-income and low-income economies. 句意为：世界各国被世界银行分为三大类：高收入国家，中等收入国家和低收入国家。
divide：分割，分开。name：命名。explain：解释。discuss：讨论。