问题
选择题
—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
答案
答案：D
D解析：本题将主谓一致和语态两个考点一起考查。large quantities修饰名词作主语时，谓语动词用复数，water和pollute之间是被动关系，故正确答案为D。