The english homework.doc

?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. __21__ these wide modern roads are generally __22__ and well maintained, with __23__ sharp curves and many straight __24__, a direct route is not always the most __25__ one. Large highways often pass __26__ scenic areas and interesting small towns. Furthermore, these highways generally __27__ large urban?centres?which means that they become crowded with __28__ traffic during rush hours, __29__ the “fast, direct” way becomes a very slow route. ???????However, there is __30__ always another route to take __31__ you are not in a hurry. Not far from the __32__ new “superhighways”, there are often older, __33__ heavily travelled roads which go through the countryside. __34__ of these are good?two-lane?(双车道) roads; others are uneven roads __35__ through the country. These secondary routes may go up steep slopes, along high __36__, or down frightening hillsides to?towns__37__ in deep valleys. Through these less direct routes, longer and slower, they generally go to places __38__ the air is clean and the?scenery?(风景) is beautiful, and the driver may have a __39__ to get a fresh, clean __40__ of the world. 21. A) Although??????????B) Since????????????????????????C) Because?????????????????D) Therefore 22. A) stable???????????????B) splendid????????????????????C) smooth??????????????????D) complicated 23. A) little?????????????????B) few??????????????????????????C) much?????????????????????D) many 24. A) selections??????????B) separations????????????????C) series?????????????????????D) sections 25. A) terrible?????????????B) possible????????????????????C) enjoyable???????????????D) profitable 26. A) to????????????????????B) into??????????????????????????C) over??????????????????????D) by 27. A) lead?????????????????B) connect?????????????????????C) collect???????????????????D) communicate 28. A) large????????????????B) fast?