Can I buy books through Internet? 我可以在网上买书吗？

Of course. There are some good websites selling books.  当然。那有一些卖书的好网站。

Would you please recommend some? 能给我推荐几个吗？

I think Amazon is really good. 我觉得亚马逊网站不错。

How can I pay bills? 我怎么付账呢?

How can I pay bills? 我怎么付账呢？

There are different ways of payment:CODs, money order and bank transfer, etc. 有好多不同的付款方式:货到付款、邮局汇款、银行电汇等等。

I prefer cash on delivery. 我更喜欢货到付款的方式。