18．In an effort to discourage people from using plastics，scientists have been hard at work inventing alternative packaging products．
The idea of using seaweed（海草） to make eco-friendly water bottles has been around for a few years．Recently，Ari Jonsson took his invention-a water bottle made from red seaweed-to show off at a festival．The bottles will only hold their shape as long as they are filled．As soon as these bottles are empty they will begin to break down，though they would be perfectly safe to eat．Ari Jonsson's bottles are a step closer to a widely used alternative to the current plastic ones．
The eatable water container is not the only product to add to our image of the future．Narayana Pessapaty has also created eatable spoons．After the success of his spoons，Mr．Pessapaty is ready to expand and introduce forks and chopsticks to his menu．His aim is to largely reduce the amount of plastic waste，which is a huge problem for waste sites all over the world，It is a product that may take up t0 500 years to break down，and recycling companies worldwide are struggling to deal with it．
Aside from the obvious benefits to the environment，this new packaging is also cheap to produce and therefore cheap to buy．Even better is the fact that similar eatable cutlery can be made at home，possibly a science project for children or just fun with friends．Why not experiment and create your own recipes？
 
28．Why do scientists invent alternative packaging products？D
A．To make people's life more convenient．
B．To show off their inventive talents．
C．To change the way we picnic outside．
D．To reduce the amount of plastic waste．
29．What makes Art Jonsson's water bottles eco-friendly？D
A．They can be made at home．
B．They are cheap to produce and buy．
C．They will hold their shape when they are filled．
D．They will break down themselves when empty．
30．What do Ari and Narayana's inventions have in common？B
A．They are convenient to carry．
B．They are safe to eat．
C．They can be used for a short time．
D．They are heavier than plastics．
31．What can be inferred from this passage？A
A．Home-made eatable cutlery is likely to be popular．
B．Eatable cutlery will completely replace plastics in the near future．
C．No recycling companies can break down plastic waste．
D．It's unsafe for individuals to invent eatable cutlery at home．

分析 本文講述了兩種可食用的包裝物，它們不僅無毒無污染、造價低還能循環(huán)利用，而且制作起來也很有趣．

解答 28-31  DDBA
28．D 考查細節(jié)理解．根據(jù)"In an effort to discourage people from using plastics，scientists have been hard at work inventing alternative packaging products"可知，為了減少塑料垃圾的數(shù)量，科學家發(fā)明了其他的包裝方式．故選D．
29．D 考查細節(jié)理解．根據(jù)"As soon as these bottles are empty they will begin to break down"可知，它是可以自動分解的．故選D．
30．B 考查細節(jié)理解．根據(jù)"The eatable water container is not the only product to add to our image of the future．Narayana Pessapaty has also created eatable spoons"可知，兩者的發(fā)明都是可以安全食用的．故選B．
31．A 考查推理判斷．根據(jù)最后一段中提到的可食用餐具的種種優(yōu)點，可推斷出自制的可食用餐具很可能受歡迎．故選A．

點評 閱讀理解考察學生的細節(jié)理解和推理判斷能力，做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確的選擇．在做推理判斷題不要以個人的主觀想象代替文章的事實，要根據(jù)文章事實進行合乎邏輯的推理判斷．

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