1.explain解释,  before在....之前,  realize意识到,  avoid避免,  in fact事实上,

continue继续,  mobile phone移动电话,  flag旗帜,  be good at擅长于,  hope希望,

get better变得更好,  high-technology高科技,  in all parts of各地,  printing印刷,  the compass指南针,  BC公元前,  AD公元,  way方式,  manufacture制造业,  clay粘土,

the rest of剩下的,  invent发明,  print打印,  printing press印刷机,  sold出售,

map地图,  improve进步,  available可获得的,  choose挑选,  ancient古代的,  believe相信,  correct正确的,  direction方向,  journey旅程,  possible可能的,

spread culture传播文化

2.

When was/were …….. invented?

.....是在什么时候发明的？

……… was/were invented in ……………. 

.....是在.....发明的。 

When was paper invented?

纸是什么时候发明的？

Paper was invented in 2nd century BC.

纸是在公元前2世纪发明的。

Who was ………. invented by?

.....是由谁发明的？

……… was invented by …………

.....是由....发明的。

Who was printing invented by?

谁发明了印刷术？

Printing was invented by Chinese.

印刷术是由中国人发明的。

Where was ………. invented in?

....是在哪里发明的？

……… was invented in …………

......是在.....发明的。

Where was paper invented in?

纸是在哪里发明的？

Paper was invented in China.

纸是在中国发明的。

3.

What was ……. used for in ……….?

在........是用来做什么的？

………….. was used for ………. in ………  

在.......是用来....... 

What was printing used for in China?

在中国印刷术是用来做什么的？

Printing was used for printings books in China.

在中国印刷术是用来印书的。

How did ………. change the world?

.....是如何改变世界的？

…………………………  

How did paper change the world?

纸是如何改变世界的？

People could write things on it, it helped people to 

spread culture and record history.

人们把事情写在纸上，它帮助人们传播文化记录历史。

4. 

Can you explain to me the rules of the game?

你能给我解释一下游戏规则吗？

I visited my grandparents the day before yesterday.

我前天探望了我的爷爷奶奶。

I didn’t realize you were sad last night.

我没有意识到昨晚你很悲伤。

We should avoid going out alone at night.

我们应该避免晚上独自外出。

In fact, I have finished my work long time ago.

事实上，我很久以前就写完作业了。

She wanted to continue working until she is 60.

她想要一直工作到60岁。

I was talking to my friends on the mobile phone.

我在用手机跟我的朋友打电话。

We raise the national flag every Monday.

我们每周一升国旗。

My brother is at good at playing computer games.

我弟弟擅长打电脑游戏。

I hope you can help me with my homework.

我希望你能帮我写作业。

I hope things will get better.

我希望事情能越来越好。

Hua Wei is a high-technology company in China.

华为在中国是一家高科技公司。

I am not happy with this way of working.

这种工作方式我很不开心。

Vitamins can’t be manufactured by our bodies.

我们的身体不能制造维他命。

The rest of students have already finished their exams.

剩下的学生已经完成了他们的考试。

Clay will become hard when it is baked.

粘土被烘烤过之后就会变硬。

Each card is printed with different information.

每张卡片被印上不同的信息。

Printing press is a machine that produces books and newspaper.

打印机是制造书和报纸的机器。

The potatoes in this supermarket were sold very well.

这家超市的土豆买的很好。

Can you find Black Hill on the map?

你能在地图上找到黑山吗？

This is the only room available.

这是唯一的空房。

Don’t expect it to improve overnight.

不要期待一夜之间就能进步。

You will have to choose whether to buy it or not.

你要选择它能不能买。

Ancient Chinese already knew how to use tools to build houses.

古代的中国人已经知道如何使用工具建房子了。

I don’t believe what you say.

我不相信你说的话。

Am I correct in saying that you know a lot about history.

你知道很多历史，我说的对吗？

We are going in the wrong direction.

我们在错误的方向上行进。

Did you have a good journey?

旅途过得愉快吗？

It is possible to get there by bus.

坐公交车到那里是可能的。