Put the following sentences into the passive voice:
8 You should keep dogs on leads in the garden ...............................................................................................
9 Why did no one inform me of the change of the plan? ...............................................................................................
10 She used to make cakes on her own at Christmas ...............................................................................................
11 Nobody has used this room for ages ...............................................................................................
12 The judge gave him two weeks to pay the fine ...............................................................................................
13 They make these artificial flowers of silk ...............................................................................................
14 Students are doing a lot of work ...............................................................................................
15 We won’t admit children under sixteen ...............................................................................................
16 What did he write it with ? ...............................................................................................
17 Did the idea interest you ?