(Fighter jets) may roar over a front line.Logical formLearned from7 sentences. A mudslide may roar.Logical formLearned from7 sentences. Expansion may roar at a rate.Logical formLearned from7 sentences. A tornado may roar.Logical formLearned from7 sentences. Water may roar into a submarine.Logical formLearned from7 sentences. Bombers may roar over a world-city.Logical formLearned from7 sentences. Bulldozers may roar.Logical formLearned from7 sentences. A river may roar toward centers.Logical formLearned from7 sentences. Some gunmen may roar behind a car.Logical formLearned from7 sentences. Gunships may roar.Logical formLearned from7 sentences. Avalanches may roar.Logical formLearned from7 sentences. A sound of (jet fighters) may roar.Logical formLearned from7 sentences. A wildfire may roar.Logical formLearned from7 sentences. A country may roar into contention.Logical formLearned from7 sentences. A shuttle may roar into orbit.Logical formLearned from7 sentences.