The manager his factory’s products were poor in quality.decided to give his workers further tra——青夏教育精英家教网—

摘要： The manager his factory’s products were poor in quality.decided to give his workers further training． knowing

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The manager，knowing his factory's products were poor in ________，decided to give his workers further training.

A．quantity 　　　　　 B．amount

C．deal　　　　　　　　 D．quality

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