What can I play when I play a tune in G on my flute? What should I blow? What keys are widely used?

G key can be played simply: happy golden snake dancing wildly; Medium: it is difficult for trains on the sports ground to get to Beijing to sell vegetables; Hanging a red light (Zhou Chenglong Song) requires Shuang Tu to harvest; If Shuang Tu's skills can't reach the level of performance, the music at this stage will only be a feeling of neither fish nor fowl. Personally, I feel that E key is the most fun and widely used, but it is the most difficult to choose.