If you heat water to 100 degrees, It boils, If l study hard, I will pass the exam, If it rains tomorrow , We will stay at home , If l had a car , I would travel around the country , If she were here, She would help us , If they had left earlier , They would not have missed the flight ,  If students are late , The teacher gets angry , If you don't sleep well , You feel tired the next day , If he were more confident , He would speak up in class .

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