This song is sung by a famous singer every year. (No error)
The letter was written yesterday and sent this morning. (The correct form is "was", because "letter" is singular.)
These computers are made in Asia. (The correct form is "are", because "computers" is plural.)
The report was finished by the team last week. (The correct form is "finished".)
These laws are passed by the parliament. (The correct form is "passed".)
The ancient Egyptian pyramids were built thousands of years ago. (The correct form is "were", because "pyramids" is plural.)
The news is broadcast on television every evening. (The correct form is "broadcast".)
Ответ: See above