是an history class还是a history class?

是an history class还是a history class? 历史课的英文表述是history class 还是history lesson the history class 是单三么 a 150-year history 还是 an 150-year history What tree is in an important test in history class? 什么意思?翻译下 take,I,you,to,a,need,class,think,history(连词成句） 1.We are having a history class.（改为一般疑问句） _____ _____ having 英语翻译翻译全文：A teacher stood in front of his history class of tw In a history class ,we are ( )( )the past两个括号里填什么单词? one winter term during college,i took a history class to fuf They are having a class in the History of the Communist Part 英语翻译My class had a big history project about ancient ciciliz