Personally, I think applying to Oxford is not the best option when you are getting an E in any of your AS level subjects. Getting an A in Arabic in Year 12 is very impressive if you learnt the language without having any relations in your family, as it is considered one of the most difficult language in the world and takes a lot of time to learn the language. You chose subjects in pairs that don't really relate to one another(languages&science), it is obscure for me what you would like to study in university. But this doesn't mean you wouldn't get in, it still would be possible to get into Oxford if you are exceptionally good at maths or language, and decided to explore scientific/linguistic subjects to widen your knowledge!
To answer your question, the UCAS website states: "You must enter all your qualifications from secondary education onwards – whether you have the result (even any that were ungraded) or you're still awaiting ..."