Do you mean people who are originally from Siberia? If yes, I would say "The indigenous people of Siberia". "Residence of Siberia" means people who just love there, including every single person who is currently living there regardless of where they are from. "Aboriginals" is usually used when referring to the indigenous people of Australia. Although the word itself means "indigenous", It seems that majority of people would still use it only when referring to the Australian folks.

Both are correct, however, different parts of the world might find one or the other more natural. In the UK, I would say we use "catches the worm" more often and it just sounds better.

In that example "as" means "how" not "what" Also, "used to do" is past tense, "used to doing" is present tense.

When you actually feel that you love her and want her to know that.

I would probably always say "for 16.8.2016". When you say "on 16.8.2016", it could start to sound a bit ambiguous as its not clear whether he made the appointment on 16.8.2016 (as in contacted the clinic on that day) or for 16.8.2016 (as in contacted the clinics some other time and asked for an appointment on that date)

"Is this sentence correct?" I thought you "were" a teacher. You need to use "were" because you used the past tense at the beginning of the sentence.

The meaning is pretty much the same. However, the second one might imply that the other ingredients are already together in a mix and then we are adding flour to it.if there is a need to be more specific about the order of adding the ingredients and how to mix, both sentences are a bit ambiguous.

"Clean" is usually used to refer to physically cleaning something, whereas "clean up" can be used to mean something more like "cleaning + tidying + make better and nicer + put in order".