古人类的化石是研究人类起源问题的直接证据．　

阅读短文，下列问题

Computers are very important for the students now. For the city students, it's very easy to find a place to surf the Internet(网上冲浪). And for the village students, they can go to the Internet bar(网吧). Most of them spend more than two hours there, and some of them even spend more than eight hours there every day. They can do their homework, download(下载) some information for their homework, download music, send emails and play games.Most of them spend too much time playing games, so it's bad for their study.

读诗《寻隐者不遇》，根据课文内容填空

　松下问童子，____。

　只在此山中，____。