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