back in Beijing 为什么要用in?

back in Beijing 为什么要用in? back to beijing 和back in beijing 区别back to beijing 和back in beijing 有什么区别? His father will be back from Beijing ________a month.C.in D.forD 为什么错了? Hi,I haven't seen you for a long time.---I__ in Beijing.I've just come back.答案是shall be,was为什么不可以呢 in the city of Beijing是什么意思?为什么要用介词in? 英语翻译well,I will stay in US around of a week and back to Korea and can back to Beijing... “北京的冬天”的英文是in winter in Beijing还是for winter in Beijing?为什么 my father will be back from Beijing ___ a week(in/for/after/later) mow he is back home in beijing...home是副词还是名词 Tom_____(go) to Beijing.He _____(be) back in three days. I am so glad to see you back in Beijing and how long _______ in New York.A.have you stayed B.did you stay C.do you stay D.will you stay为什么呢 He lives in Beijing now为什么不是He is living in Beijing now She taught in Beijing last year.对in Beijing 为什么题目是taught teach Do you live in Beijing?I used to live in Beijing.这样回答是否正确?为什么 I live in Beijing.对Beijing 提问Where do you live?为什么不用in The weather in chongqing is hotter than that in beijing .为什么要用that为什么不能用it The 2008 Olympics will be held in Beijing.为什么Olympics要加s? 求教do you remember meeting me in Beijing?请问这里的meet为什么要加ing?