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In the text below some words are missing. Drag words from the box below to the appropriate place in the text. To undo an answer choice, drag the word back to the box below the text.
America’s sky
By 2025, government experts say, America’s skies will swarm with three as many planes, and not just the kind of traffic flying today. There will be thousands of tiny , seating six or fewer, at airliner , competing for space with remotely operated drones that need help avoiding midair , and with commercially operated rockets carrying and tourists into space.
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