Since the recent river pollution in several provinces, people more and more attention to the quality and safety of drinking water.
A. pay
B. are paying
C. have paid
D. have been paying
网友回答
A. pay
B. are paying
C. have paid
(答案→)D. have been paying
解析：考查时态：句意：自从最近几个省的河流污染，人们一直在越来越多的关注饮用水的质量问题。时间状语是.Since the recent river pollution in several provinces,可知与完成式连用，因为这个动作是过去到现在一直在做，而且可能还要继续下去，所以用现在完成进行时，选D。