Помогите определить время и залог сказуемого.
1. Economists make models because they want to use them in economic analysis.
2. The term “macroeconomics” was first used in the 1930s.
3. Russia’s economy didn’t grow fast in 1990s.
4. Most of the lands in the North of the country have not been used yet.
5. Brazil has recently increased the exports of foodstuffs.
6. There are some applied fields of economics in which specialists are interested.
7. Profit and losses of the firm are being studied by the manager at the moment.
8. The government policy is changing the economic conditions in this region.
9. If the company raises labour efficiency, it will become more profitable.
10. The managers were discussing the report for over an hour.