是不是家长应该控制孩子来上网呢？用英语回答一下这个问题．谢谢．

The answer must be yes.
I am a teacher in a college,some of the students are busy with computers online to play online games,chatting in QQ, even they look over some pages with sex and volience,this is very harmful for their growth both physically and mentally.
Why the situation becomes that? This is all because of the lack of control from their parents and they are to young to face it.
The students in my college are more than 16 but they cannot control themselves when they facing a computer,so I know what is your choice .