If your pen broke at school today,what would you do?You would go to a shop and buy a new one.What if you could simply print out a real,working pen with your 3-D printer without leaving your room? The 3-D printer has been used to make many different things.People have made cups cars and even an airplane with it. Doctors have been using 3-D printers for several years.People's nervous systems have been printed out in 3-D form medical research.Some body parts have been printed and used in hospital.Several months ago,doctors used a 3-D printer to rebuild Ten years ago people could only see 3-D printing in science fiction movies.But now 3-D printing is here and it's bringing big changes. Unlike normal printing that can only copy a 2-D picture with ink.3-D printing can build almost anything made from material.The printer layers the material in different shapes to create the object you want to be copied.the face of a person who had a bad accident.In the future,it is expected that the printer will make human organs to save more lives. However there are _ to the printer.At the moment,printing can be quite slow and it's still rather expensive.The average price of a household printer is around $1,700,not including the cost of the materials. But as the technology develops,it shouldn't be long before disadvantages are improved.Only time will tell where this new technology will take us. ,A, B, C, D,. People could see 3-D printing in _ ten years ago. A) large high school B) science fiction movies C) digital camera shop D) hospital
B

* You'll never be good at Maths. It's generally accepted that boys are good at Maths and girls aren't. The fact is that it isn't true. When girls reach their teens, most of them lose their interest in Maths. They think they are females. They want to stay away from things that are boys' things, and Maths is still thought of to be a boy's thing. The Maths class is hard, but if you give it a chance, you could be great at Maths, especially because you are a girl. * Being skinny is good. Lots of websites tell visitors that losing interest in eating is a beautiful thing. They are lying. Losing interest in eating is a disease, not a healthy thing. It can kill you. * You are not supposed to make as much money as a guy. It's said that in 2014 women who work full-time earn about 23 percent less than guys earn. Once you see real women successful in cool jobs, you'll truly get that you're worth just as much or more than any guys. * Caffeine will help you study better. Caffeinated soft drinks have long been advertised as must-haves for women when you have to work very hard. But if you want to do your body a big favor, you'd better give up caffeine. Supposing in 2014 a man earns $20,000, how much may a woman doing the same job get? A) About $20,000. B) About $25,000. C) About $10,000. D) About $15,000.
D

Mr and Mrs Green had different ideas about where to go that weekend.Mrs Green wanted to go to Florida to see her sister,but Mr Green didn't want to go there.He wanted to go to Maine."Maine is a little cold,"said Mrs Green."I like swimming,but the water in Maine is usually not warm enough." "Florida's too far,"said Mr Green."We don't have enough time to drive there.It'll take us more than two days." Just then,the phone rang.Mr Green answered the phone.It was Mr Green's mother."Is that Jim?Please come in the shortest time.I need help.I'm calling from the hospital in Boston." They stopped their talking and in no time they both went there. Where did they go at last? A) Boston. B) Maine. C) Florida. D) Nowhere.
A