Очень срочно нужна помощь по английскому тесту.
SIGN, PRESENT, ATTRACT, APPEAR
The (B1) dolphins hold for humans goes back thousands of years. Ancient Greek artists decorated coins and pottery with pictures of dolphins, and they often make an (B2) ... in Greek and Roman mythology. Sailors have always regarded the (B3) ... of dolphins as something which (B4) ... a smooth voyage.