A. My favorite music is life gose on. -> My favorite song is Life Goes On. 

=> Your sentence has a correct grammatical structure, but this has the correct usage/ expression.

=> Corrected spelling.

B. What can you do? ✔

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I can play the piano and  the cello.✔ 

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=> Corrected : The sentences are corrected grammatically.

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Shh Be quiet.-> Shh! Be quiet! (Punctuation)

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