ответить на вопросы с вашей точки зрения pre-reading answer the following questions 1. have you ever met anyone who stutters? 2. what do you think causes stuttering? 3. how do you think stuttering is treated? 4. what can help the people who stutter to communicate with other people?

Yes, I have. It was my friend's younger brother. 
2 I think nervousness or shyness may cause it. Sometimes when people are embarrassed or confused they might start to stutter as well. Some other people may stutter because they are scared. 
3 Maybe people who stutter do some special exercises which help them to speak more easily. If stuttering is caused by some disease, maybe doctors give their patients medicine. 
4 People who stutter must become more confident and more relaxed. Also I read that they are advised to speak slowlier and this might help them not to stutter.