求助：a history of 的用法和 be over+time+years old的用法,能举些例子就更好了!

求助：a history of 的用法和 be over+time+years old的用法,能举些例子就更好了! 求助……most和most of的区别用法 about 200 years of history=has a history of about 200 history?为什么has a history of about 200 history中同时有of 和about的存在?还是说of和about 要任选其一? 求助英语翻译“Track purchase history across your organization”特别是across在这用法和含义?谢谢! 请教以下句子里,of的意思和用法.Of all the subjects,I like history best because it gives us a useful knowledge of things in the past. witness 的用法：The great wall _____ the history of war.A,witnesses B.witnessed C.has witnessed A Student of History a lot的意思和用法my father and I like it a lot是不是=very much?xx learns a lot of Chinese movies呢I can learn about a lot the history呢? a lot和 lots of的用法 a kind of的用法和意思? a lot of的意思和用法 求助英文ppt关于“克隆的历史”求助一篇题目是“the history of cloning的 presentation! （高一英语）关于 动词ing 形式和a 的用法?1 Kwanzza is a seven-day festival celebrating the culture and the history of African Americans.其中为什么要用celebrat的ing形式呢?2 African Americans have a long history and a rich cul lots of和a lot of的区别和用法 求助history of sport of China 一篇 字数不限 Chinese history 和history of China以及其他类似的情况在Chinese history 和history of China以及其他类似的情况在表达方式上有啥侧重点啊? 关于about和of的用法比如说；the book of historythe book about history在含义上有什么区别?哪一个学术性更强? 600 years' history 和 a history of 600 years有什么区别吗?