I spoke to my boss using humble language.

I booked an air ticket for my trip next week.

He couldn't admit his own prejudice.

We decided to take on the sponsorship of this event.

He loves Ppongjjak music.

He strongly criticized the idea of fundamentalism.

He sealed the letter and posted it in the mailbox.

It is important to understand the basis of this problem.

We need drastic reforms.

This is a fundamental problem.