1) A burglar has stolen a lot of valuable paintings. a) A lot of valuable paintings have been stolen by the burglar.  b) A lot of valuable paintings were stolen by the burglar. c) A lot of valuable paintings are stolen by the burglar. 2) We asked the crime prevention officer to visit our house. a) The crime prevention officer was asking to visit our house. b) The crime prevention officer was asked to visit our house. c) The crime prevention officer is asked to visit our house. 3) Law protects the citizens. a) The citizens are being protected by law. b) The citizens were protected by law. c) The citizens are protected by law. 4) They are building the prison now. a) The prison is built now. b) The prison is being built now. c) The prison was being built now. 5) We couldn't identify the stolen property. a) The stolen property couldn't be identified. b) The stolen property couldn't being identified. c) The stolen property couldn't will be identified. 6) I had written the postcode on the bottom of my video recorder. a) The postcode was been written on the bottom of my video recorder. b) The postcode has been written on the bottom of my video recorder. c) The postcode had been written on the bottom of my video recorder. 7) You should keep the doors locked. a) The doors should be kept locking. b) The doors should be kept locked. c) The doors should being kept locked.

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