Hello Woojung,

Thank you for submitting your homework.

Please check on my corrections thank you.

We eat delicious rice. -Correct

We play ganggangsulae, which is a traditional Korean circle dance play (by women under the bright full moon)

Correct:  We play ganggangsulae, which is a traditional Korean circle dance play by women under the bright full moon.

** You don't have to put open and close parentheses for this sentence.

We eat songpyeon -correct