-What should we do before we use this machine?-I think we must read first. A. inf

发布时间：2020-08-20 14:27:33

---- What should we do before we use this machine?
---- I think we must read      first.
A. information           B. instructions          C. book

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解析：information：信息；消息；instructions：操作指南；用法说明。使用machine之前当然应该是先看说明，故选B。
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