when somebody says thanks or sorry to you ..? don't mention it /don't say so /it is nothing /that's all right /forget it /don't worry about it /think nothing of it/please don't /no problem /sure/you bet .which sentences above can only be used to answer "thank you "?which sentences can only be used to answer "sorry "?which can be used both ?please make a list for me .thanks ~thanks :sure /don't mention it /forget it /no problem /not at all ;;;sorry :forget it /no problem /not at all /that's all right /don't worry about it /forget it ;;;is my list all right ?