Complete the sentens with a suitable variant.I read about it in

Complete the sentens with a suitable variant.
I read about it in some book,does it matter ... it was?
1)where 2)what 3)how 4)which

Suggest an appropriate variant to complete the sentens.
Tom ... a photograph of me while I ... .
1)Was taking , did not look 2)took, had not been looking 3)took was not looking 4)had taken , did not look