"Whose is this?"—"It's mine."

“这是谁的？”—“是我的。”

Excuse me, is this your seat?

对不起，这是您的座位吗？

Is this the bus for Chicago?

这辆公共汽车是去芝加哥的吗？

Is this where we turn off?

这儿是我们换道的地方吗？

Is this your bag, missus?

大姐，这是你的袋子吗？

Is this the right way to the beach?

去海滩是走这条路吗？

Is this the place where it happened?

这就是事发现场吗？

Is this a duplicate or the original?

这是副本还是正本？

What is this tool for?

这个工具是干什么用的？

What is this? The Spanish Inquisition?

这是怎么回事？严刑逼供吗？

Is this milk fresh?

这是鲜牛奶吗？

Is this plug fused?

这个插头有没有安装保险丝？

Is this the first time that you've flown?

这是你第一次乘飞机吗？

Is this seat free?

这个座位空着吗？

Is this your stop?

你在这一站下车吗？

Excuse me, is this the way to the station?

劳驾，这是去车站的路吗？

Is this your bag?

这是你的包吗？

To what extent is this true of all schools?

这在多大程度上符合所有学校的实际情况？

Is this all the payment I get for my efforts?

这就是对我辛劳的全部报偿吗？

You feel that it's uneconomical. Why is this?

你觉得这很不划算。这是为什么呢？

The principal reason for my change of mind is this.

我改变主意的最重要原因就是这个。

Is this project something that you think is doable?

你认为此方案可行吗？

Is this your plan for making your way in the world ?

这就是你要出人头地的计划吗？

Is this test a good measure of reading comprehension?

这种测试是判断阅读理解力的好方法吗？

I can't read your writing—is this meant to be a five?

我看不懂你的笔迹—这个是不是五字？

Is this building going to stand up to the strongest gales?

这座建筑能经得住最强劲的大风吗？

Is this fair? Well, I put that question today to the mayor.

这公平吗? 好吧，我今天就向市长提出那个问题。

Is this situation not susceptible of improvement by legislation?

这种状况有无可能通过立法加以改善？

Is this good enough? Is this real?

这够不够好？这真不真实？

Is this him? Is this you?

这是他吗？这是你吗？