A. Make 3 sentences using the word "must".

We must arrive at 9 am. (Correct)

I must study hard when I have an upcoming test.

You must be quiet in the library.

=> Corrected: The sentences are corrected grammatically. 

B. Make these sentences into English.

(10/05/21)

-일어나! 일어날 시간이야.

-어서!

-지금 몇시야?

-Wake up! It's time to get up. (Correct)​

-Hurry! --> Come on!

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

-What time is it now? (Correct)​​