Question

1.Выберите правильную видовременную форму сказуемого.
Scientists usually (prepare, will prepare, prepared) pure iron for laboratory purposes
2.Выберите глагол в соответствующем времени пассивного залога.
The majority of metals (were used, are used) in industry.

Answer 1

1scientists usually prepared pure iron for laboratory purposes
2The majority of metals are used in industry