It is well known that water is not endless resource,nor that can be made once more.A. th

发布时间：2020-08-15 02:21:30

It is well known that water is not      endless resource,nor      that can be made once more.
A. the, /
B. an, one
C. an . that
D. /, one

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A. the, /
(答案→)B. an, one
C. an . that
D. /, one
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