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1 I'm sorry, but you ____ fold away your tray table now.
a) must b) has to c) don't have to
2 During take-off every passenger ____ wear his or her seatbelt.
a) have to b) has to c) mustn't
3 You ____ sit down for the entire journey, you can get up.
a) have to b) mustn't c) don't have to
4 You ____ go through security, you have no choice.
a) mustn't b) don't have to c) must
5 Passengers ____ leave their luggage unattended.
a) have to b) mustn't c) don't have to
6 Susie ___ book her flight today, she can do it tomorrow.
a) mustn't b) has to c) doesn't have to
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