Have heard a noise
Объяснение:
Have you ever thought why people travel, why they try to spend the holidays far away and not at home?
Besides the banal reasons such as to have a rest from the fuss, to change the enviroment, to see the ruins, there are deepper reasons. It is clear, that the change of enviroment is very useful and is involving the new emotions and impressions. They say that in order to take the best decision it is nessesary to distract from the task and to do something different. And travelling in this case is the best way to switch our attention and to do something new and unusual to us.
I went downstairs because I had heard a noise.