阅读下面短文，掌握其大意，然后从各题所给的四个选项中选出可以填入空白处的最佳选项。

The Internet has ___ our daily life greatly in the past twenty years. With its help we can get almost any information we need within a few seconds. ___, it also brings some serious problems. Some students spend too much time ___ computer games and fall behind in their studies. In my opinion, we should use the Internet ___(4) and never let it take up too much of our time. Only in this way can we ___ a lot from it.

【第4空】