1-change the sentences from active to passive voice:
a) we must finish those letters by five o'clock.
b)they should send it to us at once.
c) he has to finish it today.
d) the police are holding him for further questioning.
e) they may organize a new group next week.
f) he has to pay the bill before the first of the month.
a. Those letters must be finished by five o'clock.
b. It should be sent to use at once.
c. It has to be finished today.
d. He's being held for further questioning.
e. A new group may be organised next week.
f. The bill has to be paid before the first day of the month.
Todos os agentes da passiva foram omitidos ou por serem óbvios ou não importantes.
a) we must finish those letters by...