Complete the sentences using 'is', 'am', or 'are' to make passive.

1) The test **is** prepared by the teacher. 2) Water cans **are** carried by the attendants. 3) The license **is** checked by the police. 4) My cars **are** repaired by the mechanic. 5) The programs **are** installed in my computer. 6) The hostel bills **are** paid by my uncle. 7) The building **is** painted by the painter. 8) Water **is** boiled on the stove by my sister. 9) The machinery **is** carried by the trucks. 10) The boxes **are** loaded by the workers. 11) I **am** invited by my friend for his birthday party. 12) The road **is** decorated with colorful lights.