Mistakes

[Emmoo10]

Hello everybody,
I have some inquires about the following statements:
1- Once more I am in London............I haven't been for ages. (Fill in the space)
2- We are living in an age which many things are done on computers. (What could be used insated of which here)
3- I (won-have won) a book and I am looking for a publisher. (Choose and what does win mean here? Does it make any sense to say to win a book in this context?)
Thanks in advance

[Sahid59]

1. because
2. where
3. best seller
_________________
Sahid59

Better tomorrow with better English

[Dozy]

#3 makes no sense with any tense of "win".