1.Flints found in the rgion extending from the Nile Valley to the highlands of eastern Iraq (attests to) the presence of people there as long ago as one hundred thousand years.
2.(In a world that) the rate of technologival and social change accelerates frighteningly, change itself often seems to be the only constant.
3.The Mount Isa mine complex is one of {the most highly mechanized} in the world, (plus being) the largest single industrial enterprise in Queensland.
错的都用()标注了,请问错在那里,怎么改正?最后一句{}里的不应该是名词吗?为什么是对的?反而PLUS BEING错了?万分感谢!