2 - crossword
3 - reading comprehension
1 - 14 for every billion rpk.
2 - revenue passenger kilometer . 1 rpk = 1 passenger carried 1 km.
3 - stress, anxiety, jet lag, low pressure, and dry air.
4 - ear and sinus pains, decompression sickness, enhancement of the effects of alcohol.
5 - a training that gives non pilots some basic theoretical and practical knowledge to land an airplane if the pilot is incapacitated.
4 - listening comprehension
1 - airstrips that are (more than) occasionaly used by cars.
2 - they are very difficult to see.
3 - into the wind and preferably parallel to the furrows.
4 - slow the aircraft down very efficiently.
5 - in an orchard.
6 - don't give up control of the airplane until you absolutely have no choice and land into the wind
5 - grammar
1 - whose, 2 - who's, 3 - it's , 4 - whose, 5 - who's, 6 - it's, 7 - who's, 8 - who's, 9 - its, 10 - whose.