Question

麻烦帮我详细解释一下这个题为什么要选这个答案。谢谢！

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

Answer 1

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。