1.Open the brackets using the correct form of the verbs.
The relations between dolphins and human beings long (1 — surprise) people.These relations (2 — last) for thousands of years. Pictures of dolphins (3 — use) to decorate the coins of ancient Greeks. Sailors (4— consider) the presence of dolphins near ships to be good luck. Now dolphins (5 — train) 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 — consider) to be our friends. No one ever (13 — see) a dolphin attack human beings.
