As is known to us all, under no circumstances temporary economic development at the expense of the environment and resources.
A. should we seek
B. we should seek
C. we had sought
D. had we sought
网友回答
(答案→)A. should we seek
B. we should seek
C. we had sought
D. had we sought
解析：考查倒装句：句意：我们都知道我们绝不能以环境和资源做代价寻求暂时的经济发展。Under no circumstances绝不，否定词在句首的时候，句子用部分倒装，情态动词should提到主语前面，这句话不能用过去完成时，排除CD项，选A。