I would say definitely use your time wisely. Make sure you are fully focused too. Though it may be difficult to focus, (I understand) try and find some outside resources that can help you bring interest into what you're learning in any subject.
Answer:
A denotation of snake is “a limbless, slithering reptile without eyelids, sometimes poisonous.”
Because you put your life on the line to save someone elses.
Correcting mistakes, your figuring out what could be better or what is just plain wrong
