Past Simple Passive

The castle (a)   (build) in the 12th century.

The delicious cake (a)   (bake) by my grandmother yesterday.

The missing dog (a)   (find) by the police last week.

The book (a)   ( write) by a famous author, but its identity remains unknown.

The experiment (a)   (conduct) carefully, but the results were inconclusive

The meeting (a)   (postpone) due to unforeseen circumstances.

The children (a)   (entertain) by the clown's silly tricks

The letter (a)   (deliver) by a messenger on horseback.

The room (a)   (clean) thoroughly before the guests arrived.

The painting (a)   (discover) hidden in the attic for decades.