The key answer of exercise 2

a)

• Speaker 1 → text messages
• Speaker 2 → Skype
• Speaker 3 → a blog
• Speaker 4 → social networking sites

b)

Benefits

• Speaker 1 → quick and cheap; texts are quiet
• Speaker 2 → can see his grandchildren; it's free
• Speaker 3 → a great way to tell people about your travel experiences; you can put up photos of the people you meet and the places you visit; as soon as you write the blog, people all over the world can read it
• Speaker 4 → found friends she hadn't seen for years and it was great to get in touch again

Negative points

• Speaker 1 → gets annoyed when you're talking to someone and they're texting someone else
• Speaker 2 → internet sometimes crashes during the phone call or he can't see the picture properly
• Speaker 3 → can't do it if they can't find an internet café
• Speaker 4 → keeps checking it when she should be working