D
阅读短文，根据短文内容从方框中选择恰当的句子把短文补充完整.

Dear Annie,
I’ve never written a letter to a newspaper before, I have just never felt the need to do such a thing. I have always felt I was quite able to do everything by myself,       .
Sometimes you really need help in life, I guess. And that’s why I’m writing this letter to you.
I have a happy family. I love my children and they love me. I’m a mother of three children. I know well how to bring up(养大) children, and two of them are already over twenty, so it is nothing new for me.
But now I have a serious problem: the Internet problem. My little son is just sixteen, and I feel he should do a lot of homework now,      . He can happily spend six or eight hours at a time on the Internet every day. He chats with people that he has never met before,      . He does lots of meaningless things on the Internet. And he sees red(大怒) if you ask him to do his homework.
I just want him to be a good student. Now he seldom does his lessons at home. I’m afraid he will drop behind in his class soon. His father is a doctor, a very kind man.       .
What can I do? And don’t tell to talk to him. We’ve tried that and it didn’t work. But this is really a big problem in our family. I have tried everything I can think of.       . You are my last hope. Please tell me what I can do!
Yours,
Ellen Smith