The key answer of exercise 4

a)

1. Yahoo employees have a free bus ride to work.
2. Yahoo employees watch films together once a month.
3. Pontiflex provides a nap room for its employees.
4. At one company, the boss writes thank0you notes to employees.

b)

• At Yahoo there's a dentist and a hairdresser at the office.
• At Google lunch is free and you can get a cheap massage at the office.
• At another company the staff does a job swap two days a year.