你觉得怎么样用英语怎么写

　　How long have you been living in this country?

　　你在这个国家居住多久啦？

　　How much water do you need?

　　你要多少水？

　　How long can a human being go without sleep?

　　人不睡觉能活多久？

　　It's fascinating to see how different people approach the problem.

　　看到不同的人怎样处理这个问题真是有趣极了。