Why does the lake smell terrible?Because large quantities of water( )a have polluted b is beingpolluted c has been polluted d have been polluted 选什么?

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Why does the lake smell terrible?Because large quantities of water( )a have polluted b is beingpolluted c has been polluted d have been polluted 选什么?

Why does the lake smell terrible?Because large quantities of water( )a have polluted b is beingpolluted c has been polluted d have been polluted 选什么?
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 选什么?

Why does the lake smell terrible?Because large quantities of water( )a have polluted b is beingpolluted c has been polluted d have been polluted 选什么?
选D,主语是quantities,复数.所以用have
water 和 polluted是被动关系,所以用BE动词.
望采纳,希望能帮到你

C
这里要用完成时态,表示过去动作对现在的影响。
主语是water不可数,所以选has

c
water是不可数名词,后面用单数
被污染了,应该是被动,而且是已经被污染,就用完成时的被动
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如果对你有所帮助,还望采纳O(∩_∩)O哈!
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选D
quantities 做主语,谓语动词用复数。如a quantity of 做主语,of后是可数名数复数,谓语用复数,如果后面是不可数名词,谓语动词用单数。
因此BC可排除,因为都是单数。而water与pollute之间是动宾关系,宾语提前,用被动。故选D

D
水是被倒,所以用被动语态
这句话是指水倒进湖后对现在湖的影响,所以用现在完成时。