Hello there Woojung,

Thank you for submitting your homework and sharing something about your friend.

Please take notes of my corrections..^_^

Woojung: My best friend is friendly. -correct!

**NOTE**
~ This sentence is correct but you can still use other adjectives to describe your friend. (good, nice, kind, etc.)

Woojung:  I think everyone needs least one best friend becuase then they will be happy at the school with their friend and play together when there is no one to play with.

Correct: I think everyone needs at least one best friend so that they will be.

**EXPLANATION**
~You can separate your sentence. When you use the word "least" and you followed it with a number don't forget to use "at". (at least five, at least ten, at least one)

Correct: At school, they can play together.

**EXPLANATION**
~Remember to make your sentence simple and understandable.

~ Don't put contrasting ideas together if you mean to support the other idea. Like this, "play together when there is no one to play with.", when you say "together", it means that there is someone who could play with you but when you said "no one" it means that you're not with anyone.

~together - with each other

~ no one -  no person

Wojung: I think friends is best at the school.

Correct: I think friends at school are the best.

**EXPLANATION**
~ Do you mean that friends at school are the best?