Exercise B
1. False - "Mass unrest is less common than individual misbehaviour.'
2. True (according to analysts, but many passengers blame the airlines).
3. False - 'Many airlines routinely instruct their flight crews to run the (air-conditioning) systems on minimum settings.'
4. True
5. False - "there are some signs, in the US at least, that the airlines are at last attempting to respond to customer dissatisfaction.'
Exercise C
Reasons given - 1, 2, 4, 6, 7, 10
Exercise D
All the words have a negative meaning except quality, optimum and valuable.