1.lingling should study harder and try her best to get good grades .Also ,her parents should help her and not to mention her grades often .
2.He should spend less time on games ,and study hard .I think his parents can play games with him for a while every dfay ,then he should went on to do his homework .
3.He can use his pocket money to by a mobile phone .Or,he can get a part time job and earn money by himself.
4.She should try to understand her teacher If she thinks his lesson is very boring ,she can give her teacher some suggestions about it and tell him what she thinks .Then ,she may be interested in English .