Ex. 3. Rewrite each sentence, putting the verb in bold in the Passive Voice:
1. Men (tied) together tops of several trees and covered them with the skins of animals.
2. People (made) the first houses from wood, leaves and grass.
3. Limestone( slabs) covered the floor of earthen houses.
4. The ancient Egyptians (built) very simple houses by present standards.
5. Le Corbusier (has played) an important part in the history
of building.
6. Skyscrapers and great diversity of styles (characterize) architecture of the XX century.
7. Slaves( transported) large blocks of stone over long distances.
8. Men( looked for) protection under the branches of trees.
9. The Romans (sent) a lot of goods-skins, copper and iron ore, silver and gold to Rome.
10. Bit by bit Londoners (were reconstructing) London until it has become the most attractive places of the world.
