Playing games on mobile phone has also many disadvantages .  Firstly , It can (1)………………………….eye’s problems .  Secondly , mobile phone can change their way to some unwanted things . Thirdly , using many functions on mobile phone can make students to be (2)……………………. They don’t care about time for study and family . (3)…………………….,  radiation from mobile phones can lead brain damage and cause bad health (4)……………………… . For these reasons       , parents should be considered before buying a mobile phone for your school children .