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  When I      [was|used to be] a small girl, I       [was sharing|shared] the room with my sister Kate. As I was nine years her junior, I obviously      [had been going|used to go] to bed earlier than her. As soon as I      [had cleaned|cleaned] my teeth, my mum      [would lie|had been lying] next to me and sing me nursery rhymes until I      [fell|was falling] asleep.    

  One night, when my mum      [had been singing|was singing] for about several minutes, she suddenly      [stopped|used to stop] and      [stood|had been standing] up. I      [looked|was looking] over at her and saw that she      [was staring|stared] at something on the wall above my head. Without raising her voice, she      [had told|told] me to go downstairs, where my uncle      [was watching|watched] TV. Later, she told me she      [saw|had seen] a big, hairy cockroach climb out of the air grille and make its way up the wall. I      [hadn't slept|didn't sleep] much that night, as you can imagine!