题目内容
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
B
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题目内容
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
B