几句句子的语法结构请大家帮忙分析，感激不尽，谢谢。

语法书上收集的不理解的句子请大家指教，共同进步，谢谢：

1. Seated behind the court's bulletproof glass yeaterday,  Adams held his hed high as, for the first time, official details of his leadership of one of the most "feared and revered " organized criminal fraternities in the UK was outlined to the court.

此句话中划线的was 的主语应该是official details，所以，感到was 应为were 复数形式，或是我理解错了，请指教？

2. The last two decades have witnessed intensified examination and dispute about the effects of low-level radiation, beginning with the United Nations Scientific Committee on the Effects of Atomic Radiation, which reported in 1958 that "even the smallest amounts of  radiation are likely to cause deleterious genetic and perhaps also somatic effects."

此句话中划线的谓语是主动形式，而主语是The last two decades （时间），时间也能见证？

3. For over 300 years, one of the most enduring beliefs among historians of England has been that the character of English society has been shaped by the unique openness of its ruling elite to entry by self-made entrepreneurs able to buy their may into the ranks of elite society.

此句话中划线部分是否是插入语？

4. One characteristic common to unsuccessful good innovations has been that, even with extensive government support, they often have not been technologically adapted or culturally acceptable to the people for whom they had been developed.

此句话中划线部分后为何没有动词的过去分词？

5.  Historians  have used the documents to extract case histories，which have illuminated the attitudes of different social groups （these attitudes include，but are not confined to，attitudes toward crime and the law）and have revealed how the authorities administered justice.

6. The correlation of carbon dioxide with temperature, of course, does not establish whether changes in atmospheric composition caused the warming and cooling trends or were caused by their.
此句话中划线部分理解warming and cooling trends还是？
不过可以看出在or 和were之间省略了changes in atmospheric composition。