1. Shoes are made by them in that factory.
2. Bikes must not be left here by people.
3. This house was built by them in 2016.
4. The course will be finished by the students.
5. The streets are being repared.
6. These toys of plastic were made by them.
7. The new product has been finished by them.
8. Dinner was being cooked by us when they arrived.
