Ex. 2 Complete the text by underlining the correct alternative. When

Ex. 2 Complete the text by underlining the correct alternative.
When I (1) had been/was six years old, our family (2) was moving/moved from a quiet country village in Scotland to London. Life (3) used to be/was suddenly very different for us all. Now I (4) had been living/was living in a big city again, I often (5) was remembering/remembered the village and the things we (6) had done/were doing there. My annoying little brother (7) had always been playing/was always playing tricks on me. Once, I (8) walked/was walking home from school, when I (9) felt/was feeling drops of water falling on my head. I (10) would look up/looked up and (11) was seeing/saw him sitting in a tree, slowly pouring water from a bottle. At school, almost every day in break time, he (12) used to sneak/was sneaking up behind me and stick chewing gum on my back! When I (13) sat/would sit down in class, I (14) wasn't understanding/couldn't understand why all the class (15) had laughed/ laughed at me. After school, we (16) didn't use to watch/weren't watching TV like most children nowadays, but instead, we (17) would play/had played with our pets, or run around our garden. Life (18) was/would be much more fun then. When you lived in London, (19) did you used to travel/ did you use to travel) by bus? Susan has changed a lot, she (20) used to look/ didnt use to look like that.