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-Could you tell me _________? -Talking about festivals.

A. how they are playing

B. what they are doing

C. where they are going

D. why they are practicing

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Imagine having an idea, drawing it on paper, bringing it to a store and seeing it turned into an object. This is now possible with the help of 3D printers. Such machines were once used just by universities and big companies, but now, stores with 3D printing services are appearing around the United States.

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“I think 3D printing is going to be huge. It’s going to have a huge influence on society as a whole.” says KiChong Tran, one of the students in a recent class. He plans to open a 3D printing business in Cambodia.

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“The demand has been amazing. There has been a lot of interest from people. It’s been much more than I would have imagined.”

The UPS Store plans to add 3D printers in three more stores.

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Staples, an American store, is selling 3D printers on its website for as low as about $1,300. As with any technology - experts expect the printing speed to increase and the price to go down.

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Mr Jaycox thinks that within five years, 3D printing technology could become more user friendly. But KiChong Tran says even today’s technology can make a difference in a developing country like Cambodia.

“With 3D printing you can give them tools, so they are responsible more for their own development and they learn skills beyond just like learning English and becoming a tour guide or something like that. You can actually create things that give value to the world.”

He says it’s not just Cambodia but anywhere where there is a 3D printer, it can turn a good idea into reality.

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3.What can we infer (推斷)from the passage?

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A. The future of 3D printing in the world.

B. The 3D printing business in Cambodia.

C. The development and growth of 3D printing business.

D. The 3D printing classes and services in different places.

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