First Conditional - If or Unless

My parents will be angry __ I pass my exams.

__ you practice your English, you will improve it quickly.

__ they lower the price, I won’t buy that computer.

__ there is oxygen, fire cannot burn.

He’ll get lost __ someone shows him the way.

__ you go to bed late, you’ll feel tired in the morning.

__ you drive more carefully, you will have an accident.

You won't be able to travel abroad __ you don’t have a passport.

__ you don’t hurry, you’ll be late for school again.

You can’t watch TV __ you finish your homework.

__ you prune these trees, they won’t grow well.