— Why is the chemical plant closed?
— Because large quantities of waste water into the Yangtze River.
A. has been released
B. is being released
C. was released
D. have been released
网友回答
A. has been released
B. is being released
C. was released
(答案→)D. have been released
解析：句意：--这个化工厂为什么被关闭了？--因为大量的废水被排放到长江里面。a quantity of+可数名词复数时，谓语用复数；+不可数名词时，谓语用单数；large quantities of大量的......，后加不可数名词或可数名词复数，谓语统一用复数形式，排除A、B、C，故选D。