Thank you all for your answers, I'll try each sites you recommend. But you didn't say which one that have a test mode?
your signature,FortuneJack,777coin and etc but,most casino gambling site have a slot game machine
you can choose which one you like it...
CoinRalye do have a slot game, but it's too simple and not that fun.
bitstarz is very good and fair
Well, Bitstarz is one of my fav gambling sites, I'll try later.