Поставьте предложения в пассивное состояние: 1. economists must study both books and people. 2. ibm will produce more computers next year. 3. people can use their time, money and effort as they wish. 4. planners presented a new factory development scheme. 5. complete economic freedom can create many difficulties. 6. british petroleum will produce more oil.

R1both books and people must be studied by economists
2 more computers will be produced by INM next year
3 time money effort can be used by people as the wish
4 a new factory development scheme was presented by planners
5 many difficulties can be created by complete economic freedom
6 more oil will be produced by British petroleum