1.
How long does it take her to bake cake ?
她烤糕点要用多长时间？
2.
How long were you there?
你在那里停留多长时间？
3.
How long do you expect to be staying here?
您将在这停留多长时间？
4.
5.7 How long is it to circulate bottoms up?
需要循环多长时间？
5.
How long did the exam last?
考试持续了多长时间？
6.
How long will it take to get there?
去那儿得多长时间？
7.
How long can you hold your breath ?
你能屏住气多长时间？
8.
How long are you go - ing on ho - li - day?
你打算度假多长时间？
9.
How long are the lessons?
一节课是多长时间？
10.
How long does the variable last?
变量应持续多长的时间？
11.
How long have you been collecting stamps?
集邮有多长时间了？
12.
How often do you have a bad back?
你多长时间腰痛一次?
13.
How long does it take you to dress?
你穿衣服花了多长时间?
14.
How long have you had the cold?
你感冒多长时间了？
15.
The dicharge of this cargo will not take long.
卸货不需多长时间。
16.
How long has he held office?
他已任职多长时间了?
17.
How long do you watch TV every day?
你每天看多长时间电视？
18.
How long do you wash the head once?
你多长时间洗一次头？