Question

how did the instructor make dauglas a good swimmer

Answer 1

by training him or her with all his talents

Answer 2

The instructor made serious efforts to build a swimmer out of Douglas . He put a belt around him. A rope attached to the belt went through the pulley . this he was made to go back and forth across the pool hour after hour . Then he was taught how to inhale and exhale . in this way he built a swimmer out of Douglas .