Avverbio o aggettivo? Sottolinea l'alternativa corretta.

[emek]

1. My friend Dan is an artist and makes nice / nicely paintings.
2.That girl plays softball good/well.
3.Please speak slow/slowly!
4.He plays the guitar bad/badly.He's a terrible guitarist.
5.Mum is in bed:speak quiet/quietly!
6.Lucy's pictures are always beautiful/beautifully.