Benjamin Franklin invented a lot of things which made people's life easier．One of his earlier inventions was paddles for swimming．Ben had 1 if there was some way to help people 2 faster．He thought hard and slowly a picture of swimming paddles grew in his 3 ．The paddles must be neither too big nor too small．The wood which was used 4 the paddles must be neither too heavy nor too 5 ．
He began to work on the paddles and a few days later the paddles were finished．And then on the next Saturday afternoon Ben decided to 6 them out at Green's pond where there were about a hundred boys waiting．All of them had heard of Ben's idea and wanted to see whether the paddles would 7 ．
They were talking to each other,“What's to be done if the paddles don't work?”“What if he goes down?”
When Ben got into the 8 , he began to paddle．At first he swam 9 , then faster and faster until he was going through the water like a fish．The boys had 10 seen such a fast swimmer．The paddles did work．All of the boys cheered loudly for Ben, jumping up and down with joy．