What is the most appropriate response?

Audio 10
Ii otenki desu ne.
Ee (or Hai), Soo desu ne.  Or Ee (or Hai), ii otenki desu ne.
Audio 9
(In leaving Prof.'s office, a student says:)
Shitsurei shimasu.
Professor says: Sayoonara.  Or Jaa, mata.
Audio 8
Oyasumi nasai.
Oyasumi nasai.
Audio 7
Ohayoo gozaimasu.
Ohayoo gozaimasu.
Audio 6
Doomo sumimasen.
Iie.
Audio 5
Shibaraku desu ne.
Shibaraku desu ne. or Ohisashiburi desu ne.
Audio 4
Hajimemashite.
Hajimemashite.
Audio 3
Konbanwa.
Konbanwa.
Audio 2
Ogenki desu ka?
Ee, Okagesama de. Genki desu. Or Hai, genki desu.
Audio 1
Sumimasen. (trying to get an attention.)
Hai.