history的形容詞形式怎么寫

　　例句：

　　It was a new era in the history of our country.

　　這是我國歷史上的一個新紀元。

　　I have a history class at 9 o'clock.

　　我9點鐘有歷史課。

　　She used her family's history as a base for her novel.

　　她以她的家族史作為小說的素材。

　　We won't talk about that ─ that's history.

　　我們不會談論那件事的——那都已經過去了。

　　She's writing a new history of Europe.

　　她正在寫一部新的歐洲史。