Скажите видовременную форму и залог сказуемого.
1.The study of economics will help you to understand economic taws.
2. Market economy is sometimes called free-enterprise system.
3. Competition refers to the rivalry among sellers.
4. We have noted that competition benefits the public by rewarding those who use resources efficiently.

1. The study of economics will help (fut simp act) you to understand economic laws. 2. Market economy is sometimes called (prs simp pass) free-enterprise system. 3. Competition refers (pres simp act) to the rivalry among sellers. 4. We have noted (pers perf act) that competition benefits the public by rewarding those who use (pres simp act) resources efficiently.