My deskmate Tom set a good example for me,Yesterday when he was walking on the street ,he saw an old man was knocked down by a motorbike,but nobody came to help him.When saw this ,Tom offered to send the old man to the hospital.Thanks to Tom, the old man was saved.I decide to learn from Tom.

这是一篇半开放的作文，只给了提纲，具体的事情要学生自己发挥，用英语拓展语言的能力很重要，因为是已经发生过的事，所以主要用过去时，句式以简单句为主，注意单词拼写，主谓一致。