-Why does the Lake smell terrible?
-Because large quantities of water .
A. have polluted B. is being polluted C. has been polluted D. have been polluted
D
解析:考查动词时态,语态和主谓语一致。根据前一分句可知所填动词表示过去发生的动作对现在产生的影响,时态用现在完成时,动词与主语是被动关系,用被动语态。主语是large quantities of water,其中心词是quantities,是复数,谓语动词用复数,选D。
Peter, together with his parents _________ every Sunday.
A. went hiking B. go hiking C. goes hiking D. hiking