I get out of my room.           - correct
I get over my fever.             - correct
I get better on my health.
I get on the bus.                 - correct
I turn off my lamp.               - correct

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Alice: I get better on my health.
Correct: I get better on my health.
Explanation:
*get better - become healthier 
You cannot say that you improve your health, but you can have improved health condition.

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Hello, Alice! Thank you for submitting your homework. Please read the following corrections and explanations carefully. If you have questions and clarifications, you can ask me in our class. Thank you!