Now I m working in Beijing.I (worked) in Shanghai for 8 years为什么用过去式而不是过去完成时?

I worked in Shanghai for three years--Are you still working in Shanghai?--No,I'm working in Ningbo now.I_____in Shanghai for three yearsA.worked B.have worked C.had worked D.was working Now I m working in Beijing.I (worked) in Shanghai for 8 years为什么用过去式而不是过去完成时? #[39] I ______English in America for 3 years and now I'm working in a foreign-state company.A.studied B. have studied C.have been studyingD.had studied 请帮忙翻译包括选项,并分析.答案A. I ____ English in American for 3 yearsand now I'm working in a foreign-state company.A.studied B.have studied C.have been studying D.had studied为什么,请解析, ．---You have accepted the job offered by the company,haven’t you?　　---No.And .I’m now working in a better one.A．I’m happy I didn’t B．I was happy I didn’tC．I’m happy I have D．I was happy I have为什么不能用D （ ）I'm working hard____my lessonsA in B.with C.to D at Are you going to work in this film? I'm working on it now.请问这里的work on 和work in 怎么讲?什么区别 谢谢 I am working hard now and i hope i can go to Beijing university ( )in futureA sometimes B some time C sometimes D some times 选哪个? I'm working _ my computer,用in or on? email翻成中文谢谢hi..how are you?i,m fine.i,m kazmi from pakistan and living in sungnam korea.i,ve read your add at iliveinkorea.com.and wanna friendship with you.i,m 34 old and i was a teacher in a high school in pakistan.now i,m working in a make difference.Now,I am working on I have been working in this factory for about 20 years and seldom []so tired as now选择 A I have left B I had left C have I left D had I left I'm busy ( ) my homework now.A.do B.to do C.with D.in ------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of I’m interested in animals,so I ____ every Saturday working in an animal hospital.A.pay B.get C.take D.spend I'm interested in animals,so I ___every Saturday working in an animal hospital.A.pay B.get C.take D.spend 高中英语小题bob is the only one of those foreigh experts who --------in china now A worked B is working C are working D have been working he is working ( )a model plane now. a.on b.at c.for d.in