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you have received a letter from your english-speaking pen friend, clyde.
i've just returned from a tour round spain. dad wanted to arrange everything himself but mum inside on a packed tour. we visited several cities and towns but, to my mind, the visits to each of them were too short too see everything we wanted.
have you ever been on a trip abroad? what places would you like to visit in the future? would you prefer a packed trip or traveling on your own?
write him a latter and answer his 3 questions. write 100-120 words.

the history of science fiction films parallels that of the motion picture industry as a whole, although it took several decades before the genre was taken seriously. since the 1960s, major science fiction films have succeeded in pulling in large audience shares, and films of this genre have become a regular staple of the film industry. science fiction films have led the way in special effects technology, and have also been used as a vehicle for social commentary.

science fiction films appeared very early in the silent film era. the initial attempts were short films of typically 1 to 2 minutes in duration, shot in black and white, but sometimes with colour tinting. these usually had a technological theme and were often intended to be humorous. one such short was le voyage dans la lune, created by georges méliès in 1902. often considered to be the first science fiction film, it drew upon jules verne and h. g. wells in its depiction a spacecraft being launched to the moon in a large cannon. its ground-breaking special effects pioneered the way for future science-fiction films, and it became largely popular after its release.science fiction literature would continue to influence early films. jules verne's classic 20,000 leagues under the sea was adapted multiple times, notably into the 1916 film, one of the first feature-length science fiction films. others, such as edison studios' 1910 adaptation of mary shelley's novel frankenstein, and the 1913 adaptation of robert louis stevenson's dr. jekyll and mr. hyde, brought the concept of mad scientists to cinema. these two also demonstrated an early overlap between the science fiction and horror genres. into the 1920s, another success was the lost world, based on sir arthur conan doyle's book of the same name. it was one of the earliest examples of stop-motion animation, and also introduced several now-famous science fiction concepts, like monsters, dinosaurs, and hidden worlds.oddly, in the 2000s (decade), sf films seemed to turn away from space travel, and fantasy predominated. except for star trek and star wars films, the only films set off earth that appeared in the first half of the 2000s (decade) were serenity and the poorly received mission to mars and red planet. on the other hand, fantasy and superhero films abounded, as did earthbound sf such as the matrix reloaded and matrix revolutions.

science fiction has returned to being a tool for political commentary in recent times with films like a.i. artificial intelligence and minority report with the former questioning the increasing materialism of today's world and the latter questioning the political situations surrounding the world post 9/11. unique entries into the genre were also released around this time with the first science fiction romance eternal sunshine of the spotless mind.by the middle of the decade, the theater audience had begun to decline and this was reflected in the numbers attending the science fiction movie releases of this period. sophisticated home theater systems came close to matching the cinema experience, and avoided the expense and inconvenience. film studios had begun placing product advertisements prior to the start of films in theatres, seeking another means to enhance their bottom line, and alienating a segment of the theater-going audience. making up for the losses in cinema revenue, were sales and rentals of the high-quality dvd releases, many of which included previously cut scenes and extra material.

air pollution is a big problem that must facing by many countries all over the world. especially for advance country. the air pollution problem often happen in capital city like mexico city, bangkok , new york even jakarta .22 september 2o11 will be an opportunity to find another way for just one day to get around town, leave the car at home and walk,take a bus,train or cycle around town. all this is to help highlight the pollution caused by cars,not just fumes but the whole cycle of waste and disruption,the noise, delayed journeys, the whole human misery caused by traffic congestion and car pollution. almost 4o% of the transport sector's co2 emissions are produced by the use of private cars in cities.  the air pollution causes by vehicles gases,ciggaretes smoke,factories gases, carbon dioxide, carbon monoxide etc. but the worst is vehicles gases because several city with the worst air pollution,polluted the air by vehicles gases and the secondly is by factories gases.air pollution cause the biggest problem. such as the air quality in capital city getting worse,there is so many smoke,gases, carbon monoxide [co], and carbon dioxide [co2] that can make people sick. kind of disease that cause by air pollution such as asthmatic,pneumonia, tuberculosis,influenza, etc. it can happen because the emission of vehicles gases too high. dust and smoke make germs spread faster.the consequence of air pollution problems in capital city getting worst. several capital city from all over the world doing the car free day. first it just apply in a few advance country and city with the worst air pollution, but the capital city of developing countries also begin to apply it.car free day usually do once a week on weekend or sunday. government expected with this program .it can discharged the extra global warming gases into the atmosphere. on car free day people usually do some activities like sport or do some hobbies. car free day excecute on the main road that usually always crowd. the governments also do some programs like bike every sunday or we used to call that 'bike to nature'.although car free day programs often excecute but in fact the air pollution was not getting better, instead more increase than before. it is because there is so many motor vehicles plied the city road. the public transportation also make the problem of pollution getting worse. it prove that car free day program is not effective.actually people happy with car free day programs. they are also participate in this program. several of them go to work with the public transportation but they also sometimes use their private vehicles. of course, this habbit can discharged air pollution, even it's slowly.except doing the car free day program government should do another way and find another solution for discharged the atmosphere from the air pollution which is getting worse.if we see the result from the car free day program. we can say that car free day program is fail or unless. there are so many thing that government must do like puts forward that all motor vehicles must be checked regularly. the city council propose to achieve that not only by making regular emission checks compulsory, but by banning from the streets all public transportation vehicles older than 1o years and private cars older than 15 years.