Помогите пожалуйста
Complete the sentences. Use if/unless and the right of the verb.
1. The ice cream will melt if you ...( leave ) it in the sun.
2. ... you ... (break) your promise, I ... (be) angry.
3. You ... ( not pass ) your piano exam ... you ... ( practise ) every day.
4. ... we ... ( not leave ) now, we ... ( miss ) the bis.