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it is reported that 40% of the waste in Japan-------,which n

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it is reported that 40% of the waste in Japan-------,which no doubt saves many materials.
A.recycles B.is recycled C.has recycled D.had been recycled
选B,It is reported that是据说、、句子的主语是40% of the waste in Japan ,而后面的是定语从句,which 指代的是 40%废物在日本被利用这个事实,显然句中缺少谓语动词成分,因此应该选B,这是一种客观事实,一种,所以应该用一般现在时,由于是废物是被动的循环,所以用被动语态.