In the past ,air__travel__was expentive.These days,many __airline___are providing very cheap___flight___,and now a lot more people can afford to___fly____.On cheap flights like these ,you do not get free food or drink on the ___plane___.You have to bring or buy your own.And you can not choose your ____seat___.Remember that summer is the __comfortable____season to travel,so the airport will be ____busy___.So arrive at the __airport___early if you want to sit next to the window ,or next to your friend !Although flying is cheaper now ,it is not as ___crowded___as it was in the past.