根据短文内容，从短文前的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。如果选项为E，则涂A和B两项。

A．How many hours a day are you online? B．If you have IAD，what can you do? C．People with IAD are online a lot. D．In this way，you can have a good social life with other friends. E．Doctors say this is a new sickness.

 
Computers are good tools（工具）.The Internet is also good. But some people spend too much time online. They can’t stop.        They call this sickness Internet Addiction Disorder （互联网成瘾症）（IAD）.
   They spend hours talking to their friends or playing online games. Many people with IAD spend more time on the Internet than with family or friends. Some people with IAD even quit（辞掉）their jobs!
Do you have IAD? Think about these questions：     Is it a lot or a little? When you are not online，are you thinking about playing a computer game or checking your messages? When you are online，do you forget the time? Do you get angry when you can’t play a game?
 Dr. Ivan Goldberg and Dr. Kimberly S. Young have some ideas. First，ask yourself “Why am I online a lot?” Then try to take a break. For example，use the computer or play games twice a week，not every day.