Odpowiedź :
1. The decoration in their house is the most beautiful in the street!
They have the most beautiful decorated house in the street!
2. The film we watched last night bored me so much!
The film we watched last night was extremely boring!
3. Painting a room isn't very difficult.
It's quite easy to paint a room.
4. My little brother is a very fast learner.
My little brother learns very fast.
5. The flat we looked at yesterday was a bit more expensive than this one.
The flat we looked at yesterday costs slightly more than this one.