Choose the correct item.
1 You mustn't/can only take up to 23 kg of luggage on the plane. 2 Nurlan's plane is delayed so he has to/can'twait an hour before he can leave.3 You can't/needn't hunt elephants for theirivory as it's illegal.4 Dilnaz must/might come on holiday with usif she can get time off work.