When __the great book About 2000 years ago.(write )

When __the great book About 2000 years ago.(write ) The book was written in 1946,__the education system has witnessed great changes.Awhen Bsince when Boo-Boo-Boo 歌词 I __the Great Wall when I__in China two years ago. A saw was B have seen was C saw:have beenD have seen have been When __the letter__(send) to you only when i sleep __the corrs 歌词 make a boo boo China is famous __the Great wall.用介词填空 Even when I'm with my boo,you know I'm crazy over you BOO是什么意思 boo hoo 为什么不用does?when __the Quiz show on?要用is look,there are many foreigners __the great wallA to visit B visitC visited D visiting )goodbye to your father when you leave homewhat C( )is your english boo?回答：it's green 高三定语从句的题,1 The book was written in 1946,__the education system has witnessed great changes.答案说用since when,直接用when不行吗?那时XX已经发生巨大的变化了,为什么要加个since呢?2It doesn't matter （who it is 英文翻译~boo boo是啥意思呢? 英语翻译1.While the alien __ a souvenir,the girl called the police.(A)A.was buying B.bought C.buys D.is buying2.When __the car__?Sorry,i do not know.（c）A.does,invent B.did,invent C.was,invent 3.Great changes __ in Tongren in the five years.(b Impeek-a-boo