9．Zhong Nanshan.the famous medical scientist.has devoted most of his life useful ways in treating cough diseases．A．to finding B．find C．to find D．finding 【查看更多】

 

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Zhong Nanshan，the famous medical scientist，has devoted most of his life ________ useful ways in treating cough diseases．

A．to finding           B．find         C．to find         D．finding

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