"Do" is often omitted when the speaker is conveying (regularly faux) incredulousness.
A: So, I finished it yesterday.
B: Weren't you at work yesterday?
B: You read at work‽
You would never start off a conversation with "do" omitted though, unless the conversation had already been preliminarily started, by subtle environmental cues, or body language.
A: -Begins eating walnuts-
B: You eat nuts now?
A: When haven't I?
B: Aren't you allergic?
A: That's only for hazelnuts and cashew nuts.
In fact, it would sound unnatural in the previous two cases to use "do". This applies to UK English, at least - unless you're being exceedingly formal, that is. Being formal, a court magistrate might say: "Do you, or do you not, read non work related materials at your place of work, at any time, excluding the time that is set aside for lunch, and other similarly authorized breaks?".
When we omit "do", I suppose it's when we already almost know the answer, so the question is closer to a statement than a regular question is. Often, especially in the middle and upper classes, "do" is replaced by "I suppose", rather than "do" being outright omitted; a sort of afterthought, really, I suppose.
A: -Walks up to B's stall-
B: You want a hot cross bun, too, I suppose?
A: Yes, of course.
B: Sometimes I wonder if they're really worth the hassle, what with being so much hard work to cope with the bustling masses, pushing and shoving to get at their opium.
the nominative is работа, and -а becomes -е in the prepositive (and the dative, but на gets either prepositive or accusative: prep. for stationary, accusative for movement)
Yes, both of them translate like "работа". When you'll translate into English, job is something for money, in officiall way. "У него хорошая работа" - He has got a good job". "Work" can be used in any action you do. This work is difficult (Эта работа трудная). Работа as Job is more closed to profession also