why do you always think it is konüsmek

actually there is a difference here.

"kesin dönüş" means that they returned and decided never to move back abroad again.

so the thing that is sure is not your knowledge but their returning.

I would say "çok yakında" instead of "biraz sonra". when you say "biraz sonra" I understand it like in 10 min or max half an hour

Konuşurken çok meşgul görünüyorsun. Ben senin için önemli olmak istiyorum.

Umarım her şey yolundadır ve benimle her şeyi paylaşabileceğini hissediyorsundur.

I am married, I have responsibilities. Let us not lower the tone (of the conversation).

(I don´t know how to say "seviyeyi korumak" so I have translated as "seviyeyi düşürmemek" which is similar)

I have a sore throat and I am looking for the responsible people. suspects are :

ayfer,mutlu,gülseren,aydogan,arzu,gülbayar,ilknur,ibo,civan,the boy with glasses whose name I don´t know[{people who play/act occasionally and I am not familair with], civan,ali,onur,hüseyin,celal,isabella,dancer,bacardi.

how come 

do you mean it needs to be "gerekli" or do you totally find it wrong 

you can say all of these, although "özür dilemene gerek yok" is the most common form

we simply call it patates salatası

we are about 80million people and we all have different opinions :S