뭘 하죠

what should I do?

→ 뭐+를
phrase Rare #22,660
what should I do? The subject depends on context, so it can also mean “what should we do?” or “what are you doing?”
KO: 길을 잃었어요. 이제 뭘 하죠?
EN: We're lost. What should we do now?

작별 인사도 했으니 이제 뭘 하죠?

Now that we've said goodbye, what do we do?

— 맨 프럼 어스 (2007)

이제 뭘 하죠?

What do we do now?

— 폴링 다운 (1993)

아빠 이젠 뭘 하죠?

Dad, what do you do now?

— 리턴 (2003)

당신 뭘 하죠?

What are you doing?

— 좋은 친구들 (1990)