Many parents found that their children could not live without computers. When parents asktheir children to do something else, they never feel interested. Some children even get angry whenthey can not keep playing online games. Many parents don’t know what’s wrong with their children.Parents hope to have a good way to help their kids. In fact, we call these children Internet AddictionDisorder (IAD). Some kids also suffer health problems from lack of sleep. Before it happens to yourchildren, you should ask your children to have a good habit––never sit in front of the computer or usethe smartphone for over one hour a day. Then your children can keep away from IAD. interested 感興趣 smartphone 智慧型手機IAD 網路成癮症 suffer 遭受 lack 不足，缺乏
【題組】18. What is IAD according to the reading?
(A) A kind of smartphone.
(B) A kind of parent.
(C) A kind of good habit.
(D) A kind of illness (疾病).