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。