题目

Jackson is an 11-year-old boy. He seems to be very busy all day. He doesn't have time to study. Why? He is very ______ in computer games. When he wakes up every morning, the first thing he always does is to play computer games. Jackson ______ turns off (关掉) his computer. He only stops playing when he needs to eat and sleep. Sometimes Jackson ______ to play computer games. His parents think it is bad for his ______ because he goes to bed too late. Go to play with your friends, they tell him. Don't just ______ in front of the computer all day.Jackson always ______. I'm playing with my friend下列物质不能使溴水褪色而能使酸性高锰酸钾褪色的是（　　） A、C2H5OHB、苯酚C、甲苯D、乙醛