dinosaurs________millions of years ago

dinosaurs________millions of years ago one week of three years ago 对不对? It___(build) thousands of years ago. many inventins_____ hundreds of years ago million years ago,millions of years ago 那种说法对?为啥 Thousands of years ago,men lived in caves.这是首字母填空ago.为什么用ago these are food kike the food of many years ago 1 there () lots of fish in this river years ago halloween started hundreds of years ago in birtain.用hundreds Hundreds 后必须加of吗?那么hundreds years ago 求翻译.Thousands of years ago,birthdays were considered special many foods like the foods of many years ago