Offices cannot work properly ______ certain important ______.

A. without; equipments
B. without; pieces of equipment
C. unless; equipments
D. unless; pieces of equipment
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科目：高中英語 來源：同步題 題型：單選題

Offices cannot work properly ______ certain important ______.
[     ]
A. without; equipments
B. without; pieces of equipment
C. unless; equipments
D. unless; pieces of equipment

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