Язык, 5 класс тер-минасова узунова, 2 часть стр 26 3, решить

a) Charlie, Jenny's dog, is very brave and strong. Choose the correct words, complete the story and say why Charlie was given a medal.

One day Ben and Charlie walked near a river. Ben saw a boy, who jumped into the water and started to swim.

Ben (1) understood that the boy decided to (2) cross the river. He was a good swimmer, but the river was (3) deep, and he began to cry (4) "Help!"  Charlie jumped into the water quickly and (5) swam to the boy. The boy was already under the water and the dog had to look for him.  For a minute (6) nothing was seen, but then Ben saw the dog's and the boy's heads above the water. Charlie (7) pulled the boy out of the river and was given a medal for (8) courage.