Hundreds 后必须加of吗?那么hundreds years ago

Hundreds 后必须加of吗?那么hundreds years ago halloween started hundreds of years ago in birtain.用hundreds many inventins_____ hundreds of years ago hundreds of years= Hundreds of years ago,life was much harder than. 任务形阅读:hundreds of years ago ,news was 用hundreds of years造句 hundreds of之前可以加数词吗,比如：three hundreds of about后加hundreds of还是three hundred(具体数字) Hundreds of years ago,life was much harder than it is today. 英语翻译全文如下：Several hundreds of years ago there lived in a fore Shanghai_________（be） a small town hundreds of years ago.Now