5.transform the sentences using the passive voice 1 i have told the chil- dren about the party. 2 we expect students not to talk during the examination. 3 you mustn't touch this button while the experiment is in progress. 4 you should keep the flowers in a warm sunny place, 5 you must clean this machine every time you use it. 6 they had to pay the bill before they left the hotel.
1 The children have been told about the party.
2 Students are expected not to talk during the examination.
3 This button mustn't be touched while the experiment is in progress.
4 The flowers should be kept in a warm sunny place.
5 This machine must be cleaned every time it is used.
6 The bill had to be paid before the hotel was left.