1. Cows eat grass. Grass is eaten by cows . Траву едят коровы . 2. Before the World War II this famous company had made carpets. Carpets had been made by this famous company before the World War II . Ковры производились этой знаменитой компанией до начала Второй Мировой Войны. 3. I promised my children the tickets to the circus. The tickets to the circus were promised by me to my children. Билеты в цирк были обещаны мною моим детям. 4. People are constructing modern buildings for many different purposes. Modern buildings are being constructed by people for many different purposes. Современные здания конструируются людьми для различных целей. 5. The mechanics will repair the engine quickly and efficiently. The engine will be repaired by the mechanics quickly and efficiently. Мотор будет отремонтирован механиками быстро и качественно.