Carsaretooexpensiveformanypeoplearoundtheworldtoown.Notonlythatmanycitiesarealreadyfulloftrafficandmanycountryareashaveroughroads.So1dopeopletravelthosedista

　　Carsaretooexpensiveformanypeoplearoundtheworldtoown.Notonlythatmanycitiesarealreadyfulloftrafficandmanycountryareashaveroughroads.

　　So 1 dopeopletravelthosedistancesthataretoofartowalk?Theyusepublictransportation.Ifyouridethesubwayorbus 2 youliveyoucanappreciatesomeofthebenefitsofpublictransportation.Withmanypeople 3 (share)onebusortrainthereislesstrafficandmore 4 （importance）lesspollution.

　　Whichofthetypesofmasstransit 5 (describe)belowareyoufamiliarwith?Ifaregularbuscanhold dozensofpeopleimaginewhatabus 6 (two)thesizecanhold!InGreatBritaintherearemanybusesthatareknownasdouble-deckers(carswithtwofloors).

　　BusesinHaitiareoftenverycrowded.It’snot 7 (common)forpassengerstoactuallysitontherooftops.Busesaresometimescalled“tap-taps”becausethe 8 (ride)ontherooftap（敲击）whentheywanttobedroppedoff.

　　Manylargecitiesaroundtheworldtakeadvantageofthespacebeneaththestreetsandrunundergroundtrains.PeopleinParisMexicoCityandTokyomayusethesubwaysystemtogettoschooltoworkortovisitfriendsinother 9 (neighbor).BoththeJapaneseandFrenchhavedeveloped High-speedtrainstolinkvariouscities.WhileelectrictrainsinNorthAmericaaverage130kphtheFrenchTGV(high-speed-train)istheworld’sfastest 10 (average)over270kph!