Question

状语从句问题

_____ rich certain natural resources may be,they can't replace themselves and are surely to be used up in time.
A.However
B.No matter
解释一下

Answer 1

A
however rich=no matter how rich无论怎么富饶，
however后面可以加形容词rich，而no matter后面不能加。
句子意思是：无论某些自然资源是多么的富饶，它们都不能代替自身，终有一天会用完的
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