Answer:
When I entered the room, I noticed that someone drew the curtains.
After he finished packing his suitcases, he called a taxi
By the time Susan arrived at the station, the train left
She travelled through Europe for a year before she decided to settle in Spain
The room became much cooler after she turned on the air conditioning
Many people slept in their beds when the power station exploded
Step-by-step explanation:
Cheers!