◎ 题干
Offices cannot work properly ______ certain important ______.

A. without; equipments
B. without; pieces of equipment
C. unless; equipments
D. unless; pieces of equipment
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Offices cannot work properly ______ certain important ______. [ ]A. without; equipments B. without; pieces of equipmentC. unless; equipmentsD. unless; p…”主要考查了你对  【不可数名词】【介词和介词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。