问题
选择题
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
答案
答案：B
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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
答案：B