Read the text and Fill in and but so because or when.

Lucy was in her bedroom 1)... the doorbell rang.
It was dark, 2)... she switched on the lights 3)... went downstairs. She opened the front door, 4)... there was nobody there. Nervously she close the door 5)... went into the living-room. She was very scared 6)... she was all alone. She closed the windows 7)... doors tightly. 8)... , she heard a stranger noise in the garden. She went to the window 9)... looked out nervously. She screamed 10)... she saw what was outside!​