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    23．It is known that water is not endless resource.nor that can be made once more． A．the, 不填 B．an, one C．an, that D．不填, one 【查看更多】

     

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    It is known that water is not an endless resource，________can it be made once more，so we should save and protect it.

    A. so 　　　　　　 B. as 　　　　　 C. thus 　　　　 D. nor

     

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