The manufacturer emphasizes that ______ workers must receive proper safety train

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问题 The manufacturer emphasizes that ______ workers must receive proper safety training before being assigned to the assembly line.

选项 A、many
B、every
C、all
D、much

答案 C

解析语法题。every后应接名词单数形式；much修饰不可数名词；many意为“大多数”，只有all既符合句意，又符合语法，故选C。

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