Сделайте время! some boys join the navy when they are young. one of the important things they (1) (teach) (2) (be) how to swim. in one school for sailors the swimming instructor was very good. one year, however, he (3) (have) one particular boy who (4) (seem) quite unable to learn to swim. the instructor (5) (give) him extra classes. he (6) (throw) the boy into the pool at the deep end, and (7) (hold) him up with a rope which (8) (tie) to the end of a fishing-rod. the poor man (9) (use) every possible way before he (10) defeat. one day the boy (ll) (call) aside by the instructor. john, i (12) (try) very hard to teach you for a very long time, but i (13) (fail) for the first time in my life. i can't do anything more, " said the instructor. "but before we part, i want (14) (give) you a piece of advice. if you (15) (be) ever on board a ship, and it begins (16) (sink), just (17) (jump) into the sea, (18) (go) right to the bottom and (19) (run) to the shore as fast as you can! this is the only way you (20) (be) able to save your life."