The key answer of exercise 1

a)

1. b
2. c
3. a
4. c

b)

1. (After paying a fee to become a member.) You have to take an e-photo, write a description and fill out a sales form.
2. a sporting goods b cars and other vehicles c real estate d collectibles
3. By word of mouth (people told each other about it)
4. In the late 1990s
5. No
6. Meg Whitman
7. They get a 'cut' (a percentage) of each sale.
8. Yes