-Shall we have a smoke here?-No, we because this is gas station and the worker is carrying some petrol.A. can’t B. needn’tC. mustn’t D. won’t 题目和参考答案——青夏教育精英家教网—

题目内容

—Shall we have a smoke here?

—No, we _____ because this is gas station and the worker is carrying some petrol.

A. can’t B. needn’t

C. mustn’t D. won’t

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A. was; be carried out B. should be; be carried out

C. was; was carried out D. should be; was carried out

Imagine having an idea, drawing it on paper, bringing it to a store and seeing it turned into a physical 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．

Bryan Jaycox and his wife opened The Build Shop LLC in Los Angeles two years ago．The store is filled with tools like a laser cutter, an industrial sewing machine and 3D printers．Bryan Jaycox requires $ 15 an hour to print an object．He also charges a fee depending on the size of the object and up to $ 50 an hour for design and labor services．

The Jaycoxs also offer 3D printing classes for anyone who is interested．One of the students in a recent class was Ki Chong Tran．He plans to open a 3D printing business in Cambodia．"The demand has been amazing．It's been much more than I would have imagined," said Ki Chong Tran．

"I think 3D printing is going to be huge． It's going to make a huge impact on society as a whole," he added．

Mr Jaycox predicts that within five years, 3D printing technology could become

more consumer friendly．

But Ki Chong Tran says even current technology can make a difference in a developing country like Cambodia．"With 3D printing you can give them tools, and you put it in their hands so they are responsible more for their own development．

They learn skills beyond just learning English and becoming a tour guide or something like that or working at a bank．You can actually create things that give value to the world," said Ki Chong Tran．

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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A. is now available to ordinary people

B．first appeared in the United States

C．can turn your every dream into reality

D．is now only used by universities

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A．sell 3D printers and different kinds of tools

B．produce all types of printing machines

C．offer 3D printing classes and services

D．design different types of 3D printers

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A．make it easier to do business

B．be accessible to all consumers

C．change the way of social contact

D．bring about more profits to the sellers

4.How will 3D printing technology benefit developing countries according to the text?

A．It helps the people work efficiently at a bank．

B．It will promote the learning of English

C．It will accelerate the development of tourism．

D．It offers them a new way of development．

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positive through the cold season could be your best against getting ill, new study findings suggest.

In an experiment that healthy volunteers to a cold or flu virus, researchers found that people with a sunny characteristic were less likely to ill. The findings, published in the journal Psychosomatic Medicine, build on evidence that a “positive emotional style” can help the common cold and other illnesses.

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