If heat water up to 100°, - it boils, if you break your arm, - it usually takes abput 6-8 weeks to get better, if you are in a race and you overtake the person in second place, - you're in second place, If you don't want a cold, - you should have vitamin C, If you see a red flag at the beach, - you shouldn't go swimming., If you are in Buenos Aires and you need the police, - you should call the 911, If there's a fire in a building, - you shouldn't use the lift,

4th Senior- unit 6 Zero conditional

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