How do you say "no thank you" in Japanese?

What would our criminal justice system be like without due process?

How should i study korean, and how many hours should i study it? i am a high school student already learn japanese in class, also i play sports so i tend to not study korean much because i have an excuse, like, ‘i dont know how to properly study for korean’ 감사합니다

Ideas de temas para escribir una carta a una congresista