Here's the answer:
“왜 입을 다물고 있어요?”
Watch a real native speaker say it:
Here's how it sounds in a textbook:
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 94.17% of the time!
Fun fact: the hundreds of thousands of people learning Korean with Memrise get this phrase correct 94.17% of the time!
