Don't use your mobile when the plane is landing You ____(must, have to, mustn't, don't have to) your mobile when the

You have to switch off your mobile when the plane is landing. This is a very important question of general security during a flight.Когда самолет идет на посадку, вы должны выключить свой мобильный телефон. Это очень важно для обеспечения всеобщей безопасности во время полета.