Определите видовременную форму и залог сказуемого.
1. The construction of the oil center began after the plan had been adopted. 2. These text-books in chemistry were printed in our print shop. 3. A chain of thermal and atomic plants was built in 1970s in our country.

1began-past simple active.had been adopted-past perfect passive2were printed-past simple passive3was built-past simple passive