______ 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

问题描述:

______ 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

C
因为有转折关系。
(但是总觉得这句话前面应该还有东西。。。)

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”