a)are they building a new hospital near here?
→ Is a new hospital being built near here?
b)a Japanese firm makes these television sets
→ these television sets are made by a Japanese firm.
c)we can't repair your clock
→ your clock can't be repaired by us.
d)nobody informed of the change of plan
→ the change of plan was informed of by nobody.
e)somebody left this notice in the classroom
→ this notice was left in the classroom.
f)they invite Jack to their party
→ Jack is invited to their party.