NCE-4-16 里的一句话：The modern city consists of monstrous edifices and of dark,narrow streets full of petrol fumes and toxic gases ,torn by the noise of the taxicabs,lorries and buses,and thronged ceaselessly by great crowds.

1. 请问of dark中的of 是否可以去掉？

柯林斯下面例句中并没有在and 后面加of: The division will consist of two tank companies and one infantry company.

2. 从语法角度看torn by the noise of the taxicabs,lorries and buses是修饰modern city还是narrow streets?

谢谢指教。