1.Professor Smith should write the book. - The book should be written by Professor Smith.
2.They canceled the match because of the rain. - The match was cancelled by them , because of the rain.
3.They are going to finish the new road in a few days . - The new road is going to be finished by them in a few days.
4. Archaeologists have discovered an ancient temple. - An ancient temple has been discovered by archaeologists.
5.You must not cross this line. - This line mustn't be crossed by you.
6.They had picked the oranges before the storm. - The oranges had been picked by them before the storm.
7.Mr Eliot will pay the workers. - The workers will be paid by Mr.Eliot.