The 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. ___26___ these wide modem roads are generally smooth and well maintained, with___27___ sharp curv

The 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. ___26___ these wide modem roads are generally smooth and well maintained, with___27___ sharp curves and many straight sections, a direct route is not always the most ___28___ one. Large highways often pass___29___ scenic areas and interesting small towns. Furthermore, these highways generally ___30___ large urban centers which are crowded with ___31___ traffic during rush hours, ___32___ the "fast, direct way becomes a very slow route. However, there is___33___ always another route to take __34____ you are not in a hurry. Not far from the relatively new "superhighways", there are often older, ___35___ heavily traveled roads which go through the countryside. ___36___ of these are good two-lane roads; others are uneven roads___37___ through the country. Through these less direct routes, longer and slower, they generally go to places___38___ the air is clean and the scenery is beautiful, and the driver may have a ___39___ to get a fresh, clean___40___ of the world.
回答第37空

A.driving

B.crossing

C.curving

D.traveling

正确答案是D