1) It was snowing when they went out.
2) He was playing the computer game
when the door opened quietly.
3) When Alan and Tom looked at the owl,
it was sleeping.
4) When she was running to school, she
saw a man in black near the house.
5) I was drawing when my mother called
me.
6) Suddenly he saw a big black dog. It was sitting at the door of his house.
7) The children were swimming in the lake
when a strange animal jumped out of the lake.