will be learnt

5. He (to give) me this book next week
will give
gives
will be given

6. Moscow University (to found) by Lomonosov
was founded

7. The rule explained by the teacher at the last lesson (to undertand) by all of us
was understood
is understood
had been understood

8. Yesterday he (to tell) to prepare a speech
was told

9. Nobody (to see) him yesterday
saw
was seen
were seen
sees

10. I hope the invitation (to accept) by everybody
will be accepted
was accepted
is accepted

11. Budapest (to divide) by the Danube into two parts: Buda and Pest
is divided
was divided
divides
is being divided

12. The telegram (to receive) tomorrow
will be received
was received
receives

13. A taxi (to call) fifteen minutes ago, so we are expecting it any moment
was called
called
is called
is being called

14. The book (to discuss) at the next conference
will be discussed
was discussed
discussed
will discuss

15. Soon he (to send) to a sanatorium
will be sent
will sent
sends
sent

16. At the last competition the first prize (to win) by our team
was won
won
wins

17. The letter (to post) in half an hour
will be posted
was posted
is posted
will post

18. Yuri Dolgoruki (to found) Moscow in 1147
founded

19. The question (to settle) as soon as they arrived
was settled
will be settled
settled