This is it -- we have to act at once.

We've been looking for a house for months and I think this is it.

我们找房子已经找了好几个月了,我看这所就是我们要找的.

There is a large number of boys in this class.

这个班里有很多男孩子.

Many pupils in this class got prizes for good conduct.

这个班的许多学生因为操行好而得了奖.

There are altogether 40 students in this class.

这个班总共有40名学生.

Most of the students in this class are good at mathematics.

这个班的学生多半数学很好.

The work of this class has been falling behind recently.

近来这个班的成绩一直处于较低水平.

I have been given charge of this class.

我被分配负责这个班。

From the time of the birth of this child, her health gradually sank.

生育之后, 她的体质就日渐衰弱.

This child doesn't look right. Perhaps he's ill.

这孩子脸色不对头, 恐怕是病了.

This child is always making trouble for his parents.

这孩子老给父母招灾惹祸.

This case is still unknown.

这个案子还是个问号.

This case is full I can't pack any more clothes in.

这箱子已装满,我塞不进更多的衣服了.

This article yield-ed us great profit.

这东西给我们带来了很大的收益.

This article is written in a personal capacity.

本文是以个人名义所写。

He will be in Paris this day next week.

下个星期的他将在巴黎了。

" Will you come back this day week? " " That depends. "

“ 下星期的今天你能回来 吗 .” “ 那得看情况. ”

To this day I do not know why these "spirits" are here doing this to me and I have a feeling that I will never know.

直到今天，我还不明白为什么“幽灵”会在家里如此对我。我觉得也许我将永远不会知道。

To this day I don't know wether my father is alive or dead.

至今我都不知道父亲是生是死。

B: Other than the Dragon Boat Races, what's special about this day?

B:除了龙舟赛，这一天还有什么特别的活动吗？

The police called this day Black Friday because of the heavy traffic it caused.

警察将这一天称作黑色星期五，因为它会导致交通拥挤。