Решение:
1) He will do the work tomorrow. — The work will be done by him tomorrow.
2) Mr Garret locks his car every time. — His car is locked by Mr Garret every time.
3) They sold their house last year. — Their house was sold by them last year.
4) They will send the fax tomorrow. — The fax will be sent by them tomorrow.
5) The teacher explains the rule to the students. — The rule is explained to the students by the teacher.
6) Mr Morton dictated a letter yesterday. — A letter was dictated by Mr Morton yesterday.
7) He translates texts from Russian into English. — Texts are translated from Russian into English by him.
8) Mother promised a new dress to her daughter. — A new dress was promised to her daughter by mother.