it's said that --- of the water around the world --- polluteda\ two third ; hasb\ two thirds ; havec\ two third ; ared\ two thirds ; is请说明理由好吗?

it's said that --- of the water around the world --- polluteda\ two third ; hasb\ two thirds ; havec\ two third ; ared\ two thirds ; is请说明理由好吗?
it's said that --- of the water around the world --- polluted
a\ two third ; has
b\ two thirds ; have
c\ two third ; are
d\ two thirds ; is
请说明理由好吗?

it's said that --- of the water around the world --- polluteda\ two third ; hasb\ two thirds ; havec\ two third ; ared\ two thirds ; is请说明理由好吗?
选D
分数的表示方法 三分之二 分母需要用复数形式 所以是two thirds
但水是不可数名词, 而且是被污染用被动语态, 故 is polluted