______ abundant certain natural resource may be,they cannot reproduce themselves and are bounced to

______ abundant certain natural resource may be,they cannot reproduce themselves and are bounced to

题目
______ abundant certain natural resource may be,they cannot reproduce themselves and are bounced to be used up eventually.
A.while
B.whatever
C.although
D.however
答案
感觉是D,整句“无论有多少自然资源,他们都不能再生且最终都要耗尽”的意思
用however abundant,即“无论有多少”
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