Mọi người giúp mình với, xin cảm ơn

1.This hospital was built in our city (by them)in 2015.

2.That man's story isn't believed .

3.My piano is being prepared (by them) at the moment.

4.A lot of exercices were being done by students.

5.This room hasn't been used for ages.

6.Consideable damage has been caused by the fire 

7.She will be given  a present(by them)on her birthday.

8.A special edition has been written for children by the author.

9.These artifical flowers can be made (by them).

10.This room should be used (by us)only on special occasions.

                      Chúc bạn học tốt!!!