The laboratory assistant
(prepare) the experiment by seven p.m. yesterday.
Our life
(change) greatly with the appearance of electricity.
Students
(pass) their exams by last Tuesday.
The teacher
(examine) our tests by next week. поставить правильную форму глагола
пассивный заолог

1. prepared - was prepared2. has changed - has been changed3. passed - was passed4. will examine - will be examined