高中英语单选19Since then jeans____through many different changes in style.a.have beenb.had beenc.wered.are

高中英语单选19Since then jeans____through many different changes in style.a.have beenb.had beenc.wered.are 高中英语单选求助 高中英语单选一道 高中英语单选 3 道高中英语单选 三道高中英语单选题,想要详解6.The book was written in 1946.___the education system has witnessed great changesA.When B.during which C.since then D.since when7.-Do you know Anna's telephone number.-____.As a matter of fact.I don't know any 高中英语的单选练习书推荐 高中英语单选求解,第十题,谢谢. 高中英语怎么才能提高单选? But then /Before then / Since then/ Until 翻译：ever since then ever since then 人民教育出版社高中英语单词表 since then可以说成 since that time 三道高中英语单选.1、People around the world_________Christmas Tree ever since 1510.A、decoratedB、have decoratedC、have been decoratedD、have been decorating2、The small country_______since the 1880s.A、has come into existenceB、has b 从那以后是from then还是since then? since then 是啥意思? ----------------you----------------(know)him since then