Change into passive voice:
4/ Change into passive voice:
1 The scientists are carrying out an important experiment
2 People make cheese from milk
3 Did Wright brothers build the first plane in 1903?
4 Witcomb L. Judson invented the zipper in 1893
5 People have used the ballpoint pens for many years
6 They will publish a book on space travel next month
7 When I came, he was repairing the computer
8 Shakedpeare wrote Romeo and Juliet in 1592
9 Viet is going ti repaint these rooms tomorrow
10 Our factory doesn't produce this kind of paper