Ex1:Change these sentences into the passive voice 1 The nilkman brings bottles of milk to house 2 How do people learn languages ? 3 John will collect me at the airport 4 the manager must sign the cheque 5 They kept me waiting for hafl an hour 6 They are building a new ring road round the city  7 We can't wear jeans at work 8 Will you invite her to your birthday party ? 9 They have buildt a new hospital near the airport  10 Do they speak French and English in Canada ? 11 The police caught the thieft  12 They didn't look after the children properly 13 They have changed the date of the morning 14 Tam Broke the glass 15 Nga left my handbag on the bus this morning 16 People speak English everywhere 17 Did her friends give her a lot of special presents on her birthday ? 18 Last night we saw a lot of films 19 They buldt the house in 2000