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.

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