2017-01-11 15:54 来源：小牛英语
3-D printers are very hot today. They are being put to all kinds of uses，ranging from creating car models for movies to architectural① models. However，none of these ideas are as shocking as the one suggested by Anjan Contractor，who believes that they will be the key to ending world hunger.
According to some experts，world population will increase to 10 ～12 billion by the end of this century. This means that food will become very expensive and possibly，even out of reach，for billions of people.
This is where 3-D printing may save the day. Anjan thinks that the only way to solve the problem will be to equip every kitchen with a 3-D printer and print out meals from tubes of powder and oil. He believes that these meals with a shelf life of over 30 years would result in less food wastage.
Most important of all，it would be easier to make food from things that we now do not consider edible②. A great example of that is the protein from meat. Most experts believe that as the population grows，the supply is not going to be enough to feed everyone. Anjan believes that we could easily get the same protein from insects. Though all this futuristic food may sound unappealing，the scientists believe that when faced with a terrible food crisis，it will be very welcomed.
While this may sound a little difficult to believe，Anjan seems to have convinced the scientists at NASA，who are looking for a solution to feeding astronauts when they go on really long missions，like the one being planned to Mars. They gave Anjan $ 125，000 to start building the first real 3-D printer that creates the food.
Anjan is not the only one with this idea. A group led by Professor Hod Lipson has been experimenting with this idea since 2011 and has even succeeded in printing out cube-shaped creations from powdered milk and cookies with limited sugar！
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①architectural adj. 建筑学的
②edible adj. 可食用的
1. The passage mainly talks about ______.
A. whether 3-D printers will be a bright future
B. 3-D printers will be used in every field in future
C. 3-D printers will solve the problem of increasing population
D. whether 3-D printers will be the key to ending world hunger
2. Which idea is most shocking about 3-D printer？
A. Making food.
B. Making car models.
C. Printing rare materials.
D. Making architectural models.
3. It can be inferred that ______.
A. people get unappealing futuristic cube-shaped creations
B. 3-D printer can only create powdered milk and cookies
C. futuristic food that contains protein can be made by 3-D printer from insects
D. insects will be the most popular food in the future，though unappealing now
4. Which group of people are mostly in need of 3-D printer？
A. The scientists and researchers.
B. The people in Africa.
C. The astronauts working in space.
D. The farmers and off-land workers.
5. Where would you be most likely to find the text？
A. On a notice board.
B. In an institution brochure.
C. In a college newspaper.
D. On a high technology website.
1.However，none of these ideas are as shocking as the one suggested by Anjan Contractor，who believes that they will be the key to ending world hunger.
分析：who引导定语从句，前面部分为主句，在主句里含有as ... as的比较结构。在定语从句中又含有一个that引导的宾语从句。
2. Though all this futuristic food may sound unappealing，the scientists believe that when faced with a terrible food crisis，it will be very welcomed.
分析：though引导让步状语从句，主句为the scientists believe that ... be very welcomed。在主句中含有that引导的宾语从句，在宾语从句中又含有“when+过去分词”引导的省略型状语。
3. While this may sound a little difficult to believe，Anjan seems to have convinced the scientists at NASA，who are looking for a solution to feeding astronauts when they go on really long missions，like the one being planned to Mars.
1. ... when faced with a terrible food crisis，it will be very welcomed.
分析：分词在作时间状语、条件状语、让步状语、方式状语及比较状语时，往往可以带上这些连词，构成“连词+doing / done”形式。
2. ...，who are looking for a solution to feeding astronauts when they go on really long missions ...
分析：英语词汇中有很多名词、动词（短语）及个别句式中含有to，这个to是介词，而不是不定式符号。很多同学把它作为不定式符号，误写成to do，其正确形式为to doing，即动名词作to的宾语。
（1）常见的“n. +介词to”：key to，solution to，entrance to， approach to，access to，reply to等。
（2）常见的“动词（短语）+介词to”：pay attention to，get down to，devote to，look forward to，object to等。
（3）句式中的介词to：when it comes to ...（当提及到……）； prefer ... to（宁愿做……而不愿做）等。