How often do you have dinner with your grandparents 你多久和爷爷奶奶吃一次饭？
2.
How often do you telephone your grandparents 你多久和爷爷奶奶通一次电话或联系一次？
3.
How often do your parents have dinner with your grandparents 你的父母多久和你的爷爷奶奶吃一次饭？
4.
Birth and death records help governments count populations and know how long people live and what they die from 出生死亡纪录可以帮助政府了解人口数量并知道人们能活多久和他们的死因。
5.
It was so difficult not to think that everything is going wrong . we start asking why such things always happen to us 忽然间，我们想像一切的事情都会变坏，例如：要等多久和为甚么会有这些事等。
