How long are you going to stay in Zhang jia jie? 你准备在张家界待多久?

It depends on the view there. 这将由那边的风景决定。

I really want to live here for ever if I had no work. 如果我没有工作，我真的想永远住在这里。

He decided to stay there until the holiday ends. 他决定待在那边直到假期结束。

They decide to spend one day more to visit all the places of interest. 他们决定多花一天时间去游览所有的名胜古迹。