the writer called up her mother in the countryside on the phone，she learned that snakes came near their house and that the snakes seemed (make) home near their house. The writer felt proud and considered a chance for her to distinguish by inventing something would catch snakes but not harm them. She set about (research) the habits of snakes. She decided to cool them so that they could be (easy) caught. However，her first two plans were not successful. As a result，she had to attempt third time，which helped her fulfill her aim successfully. She was delighted that she was determined to send her (invent) to the patent office to get recognition for her successful idea.