Определите видовременную форму глагола (past simple, past continuous, past perfect) и выполните перевод. 1. as we know, transistors replaced electronic tubes due to their numerous advantages. 2. she had never worked with database until i taught her. 3. the computer was loading when i came in. 4. they were performing all instructions yesterday morning. 5. sorry, but i deleted your files two days ago.