B, b.
B, c, a.
B, a.
B.
C.
1б, 2a, 3б,4b.
Lie-laid - laid. Go-went - gone. Send - sent - sent. Read - read (Рэд) - read (Рэд).
Haven't seen, didn't see, have been, was.
Wrote, am writing.
Did you go to the Caucasus?
Did you bath a great deal a lay in the sun?