American Roads

The United Statesis well-known for its network of major highways designed to help a driver getfrom one place to another in the shortest possible time.________(51)these

wide modern roadsare

generally________(52)andwell maintained,with________(53)sharp curves and many straight

sections,a directroute is not always the most________(54)one.Large highways often pass________(55)scenic areas and interesting small towns.Furthermore,these highways

generally________(56)large urban centers,which means that they become crowdedwith________(57) traffic during rushhours,________(58)the"fast,direct"route becomes a

very slowroute.However,there is almost always another route to take________(59)you arenot in a hurry.Not far from the________(60)new"superhighways",thereare often

older,________(61)heavilytraveled roads which go through the countryside.________(62)of these are goodtwo-lane roads;

others are unevenroads curving through the country.These secondary routes may go up steepslopes,along high________(63),or down frightening hillside to towns________

(64)in deepvalleys.Through these less direct routes,longer and slower,they generally go toplaces________ (65)the air is clean and scenery is beautiful,and the driver may

have a chance to geta fresh,clean view of the world.

_________(57)

A.large

B.fast

C.high

D.heavy