共用题干 Highways in the USThe United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.________(51)these wide. modern roads are generally smooth and well maintained,with__________(52)sharp curves and many straight sections,a direct route is not always the most__________________(53)one.Large highways often pass_________(54)scenic areas and interesting small towns.Furthermore,these highways generally_______________(55)large urban centers which means that they become crowded with_(56)traffic during rush hours,when the"fast,direct" way becomes a very slow route.However,there is_____________(57)always another route to take if you are not in a hurry.Not far from the____________(58)new"superhighways",there are often older,________________(59) heavily traveled roads which go through the countryside._________(60)of these are good two-lane roads;others are uneven roads ________ (61)through the country.These secondary routes may go up steepslopes along hilly__________ (62)or down frightening hillsides to towns___________(63)in deep valleys.Though these are less direct routes,longer and slower,they generally go to places____________(64)the airis clean and the scenery is beautiful,and the driver may have a chance to get a fresh,clean_____________ (65) of the world. _________(51)
A.Although B.Since C.Because D.Therefore正确答案A
