How long will the flight take?

此次航班将飞行多长时间？

How long has he held office?

他任职有多久了？

How long is the River Nile?

尼罗河有多长？

How long is it to lunch?

离吃午饭还有多久？

How long a stay did you have in mind?

你原打算待多长时间？

How long is the tunnel?

这隧道有多长？

You sly old devil! How long have you known?

你这个老滑头！你知道有多久了？

What do I think about it? How long have you got?

我是怎么想的？说来话长，你有工夫听吗？

How long have you had digital?

你们有数字电视多长时间了？

How long have you been married?

你结婚多长时间了？

How long will you be staying?

你要呆多长时间？

How long would the roof hold?

这屋顶还能支撑多久？

How long have you been waiting?

你等了多久了？

How long does the play last?

那出戏要演多长时间？

How long have they been at war ?

他们交战有多长时间了？

How long were you in the queue ?

你排多长时间队了？

How long ago did you buy it?

这东西你是多久以前买的？

How long has he been in office ?

他任职多久了？

So how long is your commute?

那么你上下班路程要花多长时间？

How long does it take to qualify?

需要多长时间才能取得资格？

How long have you been unemployed?

你失业多久了？

How long have you been in this game?

你干这行当多长时间了？

How long can you balance on one leg?

你单腿能站多久？

How long have you lived around here?

你在这附近住多久了？

How long is the course?

这门课程开多久？

How long will you be staying in Paris?

你将在巴黎待多久？

How long does the journey usually take?

这段旅程通常需要多长时间？

How long has your ankle been acting up?

你的脚踝受伤多久了？

How long did you spend on your homework?

你做家庭作业用了多长时间？

How long have you been studying English?

你学英语多久了？