一项新的调查显示百分之九十的学生每天上网。剩下的一部分学生一周上网至少 三四次。虽然学生们能从网络上学到有益的东西，但是不少家长还是担心他们的健康和学习。请你将调查结果补充完整，每空一词。

A new survey shows us almost percent of the students use the Internet every day. Others use it at three or four times a week. Most of the time they do good things through the Internet. , their parents are still about their health and study. So please don't use the Internet before your homework.