Passengers must ______ their seat belts., fasten, fastens, to fasten, fastening, Travelers are allowed ______ their phones in the waiting area., use, uses, to use, using, Passengers have got ______ their boarding passes at the gate., show, to show, showing, shows, Travelers don’t ______ to print their tickets., need, to need, needs, needing, Passengers ought ______ at the airport early., to arrive, arrive, arrives, arriving, Passengers should not ______ the emergency exit., block, blocked, blocks, blocking, Travelers are not ______ to enter this area., allows, allow, allowed, allowing, Passengers can ______ a trolley near the entrance., finds, to find, find, finding, A passenger ______ to show a passport at the counter., have, to have, has, having, Passengers don’t have ______ their bags again., weighs, weighing, to weigh, weighed

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