please aidez moi svp c'est de l'anglais sur passif. ( exos 3 )

thousands of crime investigations were solved last year with the help of CCTV
cameras are often used to scrutinize visitors
each person entering or leaving the pub will be filmed
they are being used in classrooms
they complain that somebody is watching them all the time
our conversation has been recorded
her mobile phone has been seized
their complaints have always been taken very seriously