Помогите1.i can't borrow the car when/unless dad changed his mind.2. please stay until/unless the film is over3. oh no! mum will be really angry if/when she gets home4. unless/if it's really cold, we won't have the picnic.

Помогите 1.i can't borrow the car when/unless dad changed his mind. 2. please stay until/unless the film is over 3. oh no! mum will be really angry if/when she gets home 4. unless/if it's really cold, we won't have the picnic.