Is that possible UCL send offer in two months?(applied in Sept German and Phil)

Extremely unlikely. UCL in my experience and from what I've seen from others often sends offers really late.

Also note that if your qualifications from what you have listed on your UCAS application change for any reason you must declare this to the universities and they do hold the right to amend your offer in that case - even if the change in qualifications is for one that wasn't listed in the offer.

Don't assume that you can just drop subjects not specified in the offer without it potentially having an effect.

OK sorry, I wasn't assuming that, I forgot to mention that further maths was my fourth subject, thank you!

I honestly don't want to take the other modules of further Maths and if I receive offer(without condition of that）before Jan I don't need to do it, so pls does anyone know?