I'm working _ my computer,用in or on?

I'm working _ my computer,用in or on? I'm working on my computer.(变一般疑问句） I am working on my computer和I am working with my computer有什么 I'm working on the computer.And I need spare part.Can you ge 英语翻译For oft,when on my couch I lie In vacant or in pensive m No more typists working on a typewriter or computer 英语翻译In the evening ,when I was working on the computer ,Jill I can't type chinese on my computer, Also i can't install or My sister does well _ (选择）Computer Studies.A:on B:at C:in D: I need time _ my computer in my computer和on my computer的区别 I'm working on a novel.翻译