Have you ever had dreams about building a robot? Or putting together a spaceship? Or even seeing your face made out of chocolate? Done. All you need is a 3-D printer!

The possibilities of 3-D printing seem endless. All the user has to do is to design(设计) an object on the computer and choose a material(材料) to print in. The printers print in hundreds of different materials including glass, sugar and even skin! When the user presses “print”, the 3-D printer spreads the material layer(层) by layer and like magic the object is produced.

The first 3-D printer was invented in 1986 by an American, Charles Hull. But 3-D printing has only become cheap enough recently for most people to use. Designers now use 3-D printing to create unusual things. The Dutch artist Dirk Vander Kooj prints furniture made from old fridges. And doctors have used 3-D printing to print human body parts! The Telegraph reported in February that scientists from Cornell Medical College even printed a man-made ear.

But like a lot of new technologies, if 3-D printing gets into the wrong hands, it can be dangerous. In 2011 a group of four men in the US used 3-D printing to produce ATM skimmers (提款机盗刷器). These were placed on an ATM and stole over $400,000 from users of the ATM. It is terrible to think thatcriminalslike them might one day use a 3-D printer to print a gun.

But for better or for worse, 3-D printing has been put into use. In a few years, you’ll probably be wondering how you could ever live without your 3-D printer!

1._______ invented the first 3-D printer.

A.Charles Hull B.Dirk Vander Kooj

C.A doctor called Cornell D.Four men in the U.S

2.What is the correct order for people to use a 3-D printer?

a. Choose a proper material.

b. Press the print button.

c. The 3-D printer spreads the material.

d. Use a computer to design an object.

A.a-b-c-d B.d-a-b-c

C.a-c-d-b D.d-c-b-a

3.The underlined word “criminals” in the fourth paragraph might mean ______________ in Chinese.

A.技术员 B.军人 C.罪犯 D.用户

4.According to the passage, people have NOT yet produced _________ with a 3-D printer.

A.some furniture B.a man-made ear

C.ATM skimmers D.a gun

5.What does the writer think of the 3-D printer?

A.It is necessary only for our work.

B.It is helpful but dangerous.

C.It is too expensive for most people.

D.It is useless in our daily life.

你上中学已经两年了,你对自己的表现一定有满意的方面和不满意的方面。假如你是林华,请参考下面提示,写一篇80词左右的演讲稿,谈论自己的优点和不足,同时对自己提出一些更高的要求。

提示:

对自己满意的方面

勤学好问,取得进步;养成了良好的学习习惯

对自己不满意的方面

上网较多,眼睛近视,忙于学习,很少锻炼

对自己提出更高的要求

乐于助人,参加志愿者活动

要求:表达流畅,逻辑清晰,书写规范,80词左右(短文开头、结尾已给出,不计入总词数)。

Dear boys and girls,

I’m Lin Hua. I’m glad to share what I have got and lost in the past two years.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Thank you for listening!

We go to school every day and enjoy our school life. School life is usually _______ of fun, and the school seems to be _______ place in the world.

But do you know that our school life could be dangerous if we are not _______ ? How do we make the school safer and keep _______ away from danger? Here are some _______ for us to be safe in an easy way. For example, we must remember some important rules _______ the playground. Before we do sports, we need to do some warm-up activities, and after that we _______ drink some water. And in the classroom, we need to learn how to behave _______ . Don't run in the hallways. We mustn't fight with _______ run after each other. And teachers need to keep an eye on the students after class and stop them from ________ . Students should remember not ________ naughty and get ourselves into trouble. What's more, we can have some ________ to learn to protect ourselves from a fire. ________ , we can know where to go if there is a fire in our school. We should learn to use the fire extinguisher (灭火器), too. I don't think we should put out a fire alone ________ it is too dangerous for young students. Well, I think all of us should think more of our ________ in school.

1.A.fill B.full C.filled

2.A.safe B.safer C.the safest

3.A.careful enough B.enough careful C.carefully enough

4.A.we B.our C.us

5.A.advice B.information C.suggestions

6.A.to B.on C.at

7.A.shouldn't B.should C.can't

8.A.well B.good C.proper

9.A.and B.but C.or

10.A.run B.running C.to run

11.A.being B.to being C.to be

12.A.exercise B.shows C.practice

13.A.On the way B.In the way C.By the way

14.A.although B.so C.because

15.A.safe B.safely C.safety

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