Odpowiedź :
Here's your answer:
1. What will the streets be decorated (by them) with?
2. A new item is being introduced onto the market (by us).
3. This house is belonged (to my aunt).
* akurat tutaj tak się nie mówi, więc warto zastąpić: "is owned by" zamiast "is belonged to":)
4. A lot of products have been sold on the internet recently.
5. The public awarness of the current situation can be raised (by the government).
hope it'll help you;)