Вставьте can, could, must, have to или should.

Решение:

• 1. You must stop at a red light. (правило)
• 2. You play the piano when you were five?
• 3. I must finish this project by Friday. It's necessary.
• 4. You look tired. You should go to bed earlier.
• 5. Can I use your pen, please? (разрешение)