Question

— 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

Answer 1

D

试题分析：考察主谓一致。large quantities of许多，大量；该短语既可以修饰可数名词，也可以修饰不可数名词；做主语时，谓语动词使用复数形式。本句的主语是large quantities of water，故后面的谓语动词使用复数形式。句意：大量的水都被污染了。故D正确。
点评：固定搭配large quantities of许多，大量；该短语既可以修饰可数名词，也可以修饰不可数名词；做主语时，谓语动词使用复数形式。