2022黑龙江统招专升本西班牙语每日一题79

19. —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

19.【究竟】D。解析：句意：源泉为什么这湖辄起来这么难辄?源泉因为大量的出水被污染了。根据句意可知，出水辄起来很难辄的情况是因为大量的出水被污染了，可知这一动作发生地只不过，并且对今日引发影响—难辄，故应用今日收尾时;因为出水与污染两者之间是某种程度关系，故选D。