A new language can sound strange the first time you hear it, but you learn to listen to it before you speak. ( ) shouldn’t
( ) must
( ) mustn’t
( ) may
( ) should

Should

Explanation:

You should learn to listen to it before you speak.

Hope this helps!

should

Explanation:

Shouldn't and musn't is not appropiate to the statement

Must makes it seem like you HAVE to do it, like in a forceful tone

Should implies that you should consider listening to it in a more softer tone

for this, you need to remember something significant in your own life, for example, if you were bullied when you were younger, you can mention your memories on this and touch on how such treatment can harm other kids your age either physically or mentally. (racism, car crashes, a parent in the hospital are all very good subjects, think hard on it! )

hope i ! : )

one is a red flower, and one is the sky when the sun sets.