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Put the verbs in brackets into the past simple or the past continuous.Sam: Who 1)… (be) that on the phone, Ann?Ann:   George. I 2)…... (think) about him when he 3)…  (call), actually. What a coincidence!Sam:  It is! 4)… (I/tell) you what 5)… (happen) to me  and  my  mum when we 6)… (shop) in London a few years ago?Ann: No, what?Sam: Well, we 7)…  (look) around an old second-hand  bookshop  when  my mum 8)… (come) across one of her favorite childhood books. She 9)… (show) it to me and when she 10)…open) it, it 11)… (have) her name written inside!Ann:Wow, so it 12)… (be) her very own book! I bet you 13)… (not/expect) that!Sam:No, I didn't!