1) Cars might be less noisy. a) Uncertain b) Certain 2) Every family will have a flying car. a) Certain b) Uncertain 3) In fifty years from now, children may go to school by jetpack. a) Certain b) Uncertain 4) Everyone will travel by hyperloop a) Uncertain b) Certain 5) Some people might not want to travel on a hyperloop. a) Certain b) Uncertain 6) Jetpacks won’t be very useful for most people. a) Certain b) Uncertain

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