1) Passengers ______ arrive at the airport at least 2 hours before their flight. a) must b) should c) can 2) Passengers ______ leave their baggage unattended. a) must b) mustn't c) can 3) Passengers ______ carry liquids over 100ml in their hand luggage. a) must b) mustn't c) can 4) Passengers ______ smoke inside the terminal. a) can b) must c) can't 5) Passengers ______ show a boarding pass to enter the gate area. a) must b) have to c) don't have to 6) Passengers ______ check their flight status before leaving for the airport. a) must b) should c) can 7) Passengers ______ pack many things in their carry-on bags to avoid delays at security. a) shouldn't b) should c) mustn't 8) Passengers ______ carry sharp objects in their carry-on luggage. a) must b) can c) can't 9) Passengers ______ make jokes or comments about bombs or explosives. a) shouldn't b) mustn't c) can 10) Passengers ______ bring pets on board if they meet the airline’s regulations. a) can b) can't c) must 11) Passengers ______ follow the instructions of airport staff at all times. a) should b) have to c) can

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