【摘要】：—Because large quantities of water_______. quantities of不论修饰可数名词还是不可数名词，其短语作主语时，谓语动词一般用复数形式。水应该是被污染，故使用被动语态。
quantities of可修饰可数名词的复数或不可数名词，其短语作主语时，谓语动词一般用复数形式。
【考例】 —Why does the lake smell terrible?
—Because large quantities of water_______.（2009福建卷）
A. have polluted
B. is being polluted
C. has been polluted
D. have been polluted
【答案】 D
【解析】 quantities of不论修饰可数名词还是不可数名词，其短语作主语时，谓语动词一般用复数形式。水应该是被污染，故使用被动语态。
【考例】 With more forests being destroyed, huge quantities of good earth_______each year.
A. is washing away
B. is being washed away
C. are washing away
D. are being washed away
【答案】 D
【解析】 quantities of不论修饰可数名词还是不可数名词，其短语作主语时，谓语动词一般用复数形式。
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