25． a certain doubt among the workers as to the necessity of the work. A．It existed B．There ——青夏教育精英家教网—

摘要：25． a certain doubt among the workers as to the necessity of the work. A．It existed B．There existed C．There had D．It had

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________ a certain doubt among the workers as to the necessity of the work.

A．There existed B．It existed

C．There had D．It had

________ a certain doubt among the workers as to the necessity of the work.

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