Ответ:

2) I have read about tablets and i have used my friend's

3) My dad has spended a lot of money on gadgets

4) My mum has had three jobs in her life

5) My brother has bought a new net book

6) My friend has started writing a blog

7) Students from my class have won five english competitions

8) I have writed a lot of emails in my life

9) Mark has uploaded his photos to the internet. Let's look at them.