Excercise 15.Rewrite these sentences in the Passive:
1 .In ancient Russia houses (make) mainly of wood.
2. The cake...........(eat).
3. The book..........(publish) by Cambridge Uni¬versity Press.
4. The guitar.........(play) in Spain for many cen¬turies.
5. Where.........your pullover (make)?
6. These books...........(sell) in many countries.
7. Plastic........(use) in manufacturing so many things these days.
8. Over forty languages..........(speak) in Kenya.
9. Walk more quickly — I think we......(follow).
10. Windscreens......(make) from glass.
11. Listen to this! A flying sauce........(see) over Lviv.
12. This church.....(build) in the 17th century.
13. Unfortunately unleaded petrol..........(not/ use) in our cars.
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