The
relations between dolphins and human beings have long ( I been surprising) people.
These relations (2· have lasted) for
thousands of years. Pictures of dolphins (3 were used) to decorate the coins of ancient Greeks. Sailors (4 - considered) the
presence of dolphins near ships to be good luck. Now dolphins (5 are trained)
and they (6 take) part in performances that both children and grown-ups (7
like). When you (8 - spend) your holiday on the Black Sea coast you (9 - can)
see dolphins (10 play) near the shore. They usually ( 11- come) early in the morning and before sunset. They (12 -
are considered) to be our friends. No one has ever (13
~ seen) a dolphin attack human beings.