If Napoleon … (to win) the Battle of Waterloo, he … (to remain) the emperor of France., She… (not/to miss) the bus if she … (not/to be) late an hour ago., If the Titanic … (not/to hit) the iceberg, it … (to complete) its first voyage safely., If I … (to study) harder, I … (to pass) the exam yesterday., The food … (not/to burn) if you … (to turn off) the oven the day before., If the Wright brothers … (to give up) after their first failed flight, they … (not/to achieve) powered flight in 1903., I … (to invite) you for coffee if I … (to know) you were in town last Sunday., Gagarin … (to remain) stuck in orbit and run out of oxygen if the braking engine on Vostok 1 … (to fail) to fire., If we … (to take) a map on our last trip, we … (not/to get) lost., Alexander Fleming … (not/to discover) penicillin by accident in 1928 if he … (to clean) his messy lab, , If they … (to tell) me about the party, I … (to tell). Unfortunately, I missed the party., The nuclear disaster (not/to happen) in 1986 if Soviet engineers… (to design) the Chernobyl reactor more safely..

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