It is known that water is not an endless resource. can it be made once more.so w

It is known that water is not an endless resource，________can it be made once more，so we should save and protect it.

A. so B. as 　 C. thus D. nor

试题答案

D　

考查连词。根据“水既不是一种无穷无尽的资源，也不能被再制造”和nor位于句首，句子用部分倒装，可知选D。