-What makes you sad? What do you do when you are sad?

-test, count 1~30to clam down​ 

*Taking tests makes me sad. I count from 1 to 30 and then try to calm down.

~> Corrected: The sentence is corrected grammatically.

(07/12/21)

-서두르자. -Let's hurry. *Hurry up!

~> This sentence is okay. This is another way of saying it.

-좋은 아침이다. 일어나야지! -Good morning. Gotta get up! *Good morning! Wake up.

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

-어서 일어나. -Come on, get up. ✔​