Ⅰ、Good habits：
exercise for 20 minutes ， drink milk ，
read books ， take a walk after supper ，
eat fruit ， help with housework ，
take a shower
Bad habits：
stay up late ， watch TV for 3 hours ，
eat hamburgers ， go online for 2 hours ，
play computer games too much
Ⅱ、略
Ⅲ、One possible version：
Here are the results of the student activity survey at Hilltop School. Most students exercise three or four times a week. Some students exercise once or twice a week. Some students are very active and exercise every day. As for homework ， most students do homework every day. Only some students do homework three or four times a week. No students do homework once or twice a week. The results for"watch TV "are interesting. Some students watch TV every day ， some students watch TV three or four times a week ，but most students watch TV once or twice a week.