GWD－TN－12－23 急！！

The Industrial Revolution, making it possible to mass-produce manufactured goods, was marked by their use of new machines, new energy sources, and new basic materials.

A.      making it possible to mass-produce manufactured goods, was marked by their use of

B.       making possible the mass production of manufactured goods, marked by the use of

C.      which made it possible that manufactured goods were mass-produced, was marked by their using

D.      which made possible the mass production of manufactured goods, was marked by the use of

E.       which made the mass production of manufactured goods
        possible and was marked by using

答案是D

为什么不是E呢？

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