一篇英语短文完形填空Although cars are amain pollutant of the environme

一篇英语短文完形填空Although cars are amain pollutant of the environment,it hasn't s_____ designers from making new cars and showing their ideas to the pubilc.M____ the cars of the future will not pullute the air as muchen.For the m____,we don't know if the Magic Tricycle will be good to the environment,but we are s____ that is looks great and we would like to see it on the r_____It's called the Magic Tricycle b____ it has three wheels for usual driving on the road;but when you find yourself in busy traffic,the Magic Tricycle works its magic and the left wheel l____ into the air so that the Magic Tricycle b______ a motorcycle with two wheels.With this design,Seyyed Javad Ghaffarian w___ the 2008 Car News Design Contest and many people were very p_____ with this new design,"One of the biggest difficulties with this design was how to make it attractive in both its two forms." he said