帮我用英文翻译一下句子.

1.我国有必要控制人口的增长.
it is necessary for our country to control the population.

2.该是你停止工作的时间了.
it is time for you to stop working.

3.同我说话时，他停止了看书.
when talking to me, he stopped reading.

4.他工作了3个小时，然后停下来去吃饭.
he worked three hours and went to dinner.

5.我们能看见一所周围有很多书的房子.
we can see a house surrounded by many books.

6.老师走来走去，左手拿著一本书.
the teacher went around with a book in left hand.

7.这两个城市被一条铁路连接起来了.
the two cities are connected by a railway.

8.他们修了一条路把村庄和城镇连起来.
they build a road and connect the village with the town.

9.农民们正努力保护蔬菜不受寒.
farmers are working hard to protect their vegetables from coldness.

10.我得保护好我的两只宠物以防被别人偷走.
i have to protect my two pets from being stolen by others.

11.我们必须保护周围环境干净.
we must keep the environment clean.

12.不可能让蜡烛燃烧很久.
we cannot keep the candle burning too long.

1. It is