阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

Nowadays, we can do(variety) things on the Internet. We can read news, play games, and make friends.  addition, we can even do shopping on the Internet. , most teenagers spend too much time on it,  makes their parents concerned about their studies. In my opinion, we should do something  (reward) online.