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信息发布者:
discuss
closer/close
save/avoid
allows
prefer
        I hope in the future we can travel anywhere we want with just a special bag. It is small and comes 
in different colours. It's just like our schoolbag, but it is specially designed as a form of transport.
        When we need to go to school or go for a day trip, we just carry it on our shoulders and turn it on. 
Then we can fly in the air. With the GPS inside, it will lead the way so that we can easily reach where 
we want to go.
        I hope we can travel in an easy and interesting way. The special bag can make it possible, as well 
as produce less pollution. What do you think?
set sb doing sth  让某人开始做某事
make sb do sth  让某人做某事
prefer to do  更喜欢做某事
find out  弄清、查明
work out 解决,算出,制定
packaged tour 跟团旅游
1.discuss
句意:旅行可以让我们思考和讨论重大的世界问题。
根据第一段第一句话:Travel sets us thinking and makes us in discussions of major world problems.旅行使我们思考,使我们讨论重大的世界问题。题干中需要填一个动词,in discussion of=discuss,故答案为discuss。

2.closer/close
句意:我们选择在旅行时存钱,这样我们就可以去更远的地方旅行,更接近国外的经历。
根据第二段最后一句:Spending too much money makes us away from the foreign experiences we should have.花太多的钱让我们远离了我们应该拥有的国外体验。空格处表达的意思与make us away from(使我们远离)相反,可以用get close/closer to(接近/更接近),故答案为closer/close。

3.save/avoid
句意:尽管跟团旅游可以避免一些麻烦,但是自由行可能更有意义。
根据第三段最后一句: Independent travel isn't as comfortable or easy as packaged tours,but it's the most meaningful way to travel.自由行不像跟团游那样舒适简单,但却是最有意义的旅行方式。换言之,跟团游比自由行更能避免一些麻烦。can后需要接动词原形,save“避免、减少”,avoid“避免”,故答案为save/avoid。

4.allows
句意:公共交通可以让我们与当地人密切交流。
根据倒数第二段最后一句:riding buses and trains brings us into closer contact with the local people.乘坐公共汽车和火车使我们与当地人有了更密切的接触。可知公共交通可以让我们更进一步地与当地人交流。allow sb. to do sth. 允许某人做某事,主语是public transportation,单数,所以谓语动词用三单形式,故答案为allows。

5.prefer
句意:对于长期旅行,我们更喜欢背包而不是带轮子的行李,因为它们更容易携带。
根据最后一段第一句:Backpacks work better for long-term travel than the wheeled luggage.背包比轮式行李更适合长期旅行。prefer A. to B.比起B更喜欢A。故答案为prefer。
Dear Reed, 
        I have read your last letter about our future life. I'm glad to share with(与...分享) you about something I want to invent in the future.
        I hope in the future we can travel anywhere we want with just a special bag. It is small and comes 
in different colours. It's just like our schoolbag, but it is specially designed(专门) as a form of transport.
        When we need to go to school or go for a day trip(一日游), we just carry it on our shoulders and turn it on. Then we can fly in the air. With the GPS inside, it will lead the way(带路) so that we can easily reach where we want to go.
        I hope we can travel in an easy and interesting way. The special bag can make it possible, as well 
as(还) produce less pollution. What do you think?
Best wishes,
Li Hua

第一段表明自己的写信目的。
第二段介绍自己未来希望完成的发明。
第三段介绍发明在生活中的具体功能。
最后一段解释这项发明的原因。