3)
2. der Schnee
3. die Sonne
4. der Wind
5. die Wolke (Sg.) / die Wolen (Pl.)
6. der Nebrl
7. der Donner, der Blitz (Sg.) / die Blitze (Pl.)
4) A - 1
B - 3
C - 2
5a)
2 - makes no sense, but C I guess
3 - A
4 - B
the one that makes no sense to me is because of the "leider", as good weather would be a bad thing. But what du I know, I'm just a native speaker.
hope it helps you. can't see when you posted the question. Feel free to ask me anything about the language.