From the top of Mount Qomolangma to the bottom of the Mariana Trench，plastic continues to pollute the environment，and it creates a significant threat to all life forms on Earth.Despite knowing the effects of plastic pollution，we have not been able to ban the use of plastic products.Now，thanks to the invention of a 17-year-old girl，Arora，we finally have a better choice.This plastic-like material is made from prawn （大蝦） shells，and it breaks down 1.5 million times faster than most of the commercial plastic products we use today.
The Australian teen first became aware of the impact of plastic waste on the environment when shopping with her mother.She wondered why her mother had to pay for the plastic bags.When asked，the cashier informed her how plastic hurts the planet and that the additional charge was there to encourage people not to use it.This inspired Arora to create a kind of plastic that would break down faster than the conventional one.
But the journey of inventing "eco-friendly plastic" was not easy.She experimented with a number of organic materials such as cornflour and banana peels，both of which had to be ruled out because of their solubility （溶解性）.One night，while having dinner，she noticed that the shells of prawns look plasticky.She immediately went to the lab to research.Later，she would describe that dinner as her "Eureka" moment.
She extracted the material called "chitin" from the shells and then mixed it with an insoluble protein called "fibroin"，which is found in silk cocoons.Using the combination of these two organic materials，Arora created a plastic-like material that breaks down completely within just 33 days.Moreover，this plastic releases nitrogen when breaking down，which is why it can be used as plant fertilizer.
Arora's invention has caused a stir，and she has won a number of awards.As an inspiring young woman，Arora wants to make a difference in the world，and she wants to encourage other young people to follow their passion and make a positive difference however they can.
（1）What inspired Arora to create a kind of special plastic？ AA
A．A cashier's words about paid plastic bags.
B．Her determination to protect the prawns.
C．A class about plastic's impact on the planet.
D．Her plan to save money on plastic products.
（2）What could be a "Eureka" moment？ CC
A．A moment of needing reflection.
B．A moment of finding the truth.
C．A moment of having sudden inspiration.
D．A moment of enjoying the celebration.
（3）What can be known about the new plastic in paragraph 4？ CC
A．It is made from non-organic materials.
B．It can break down totally in a month.
C．It can be used to help plants to grow.
D．It is extracted from an insoluble protein.
（4）Which of the following can best describe Arora？ BB
A．Brave and clever.
B．Creative and inspiring.
C．Active and considerate.
D．Humorous and friendly.
【答案】A；C；C；B
【解答】
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發(fā)布：2024/4/20 14:35:0組卷：4引用：7難度：0.5
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1．Hi Judy!
You often complain to me that you always buy goods unreasonably on sale promotion（促銷）and feel it shameful after going back to your school dormitory with new things not needed，considering all the money you spend is your parents' income．
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Find out the conditions where you are likely to buy things blindly．When seeing a dress advertised at 20% off，do not concentrate on the discount，but warn yourself against falling into the trap of "saving money''．
Besides，do not forget the long-term effects of your choice when meeting a sales promotion．Short-term benefits，like excited feeling just after buying items encourage impulsive buying．But the long-term costs such as waste of money and the sense of shame really annoy you．When seeing the advertisements，remember what you really want to buy originally and warn yourself of that terrible feeling．Only in this way can you save money for really needed things．
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