Part Ⅳ Reading Comprehension (Reading in Depth)

　　Section A

　　47. impact/effect

　　48. They are flexible and convenient./They, easily surpass trains or buses as a flexible and convenient mode of personal transport.

　　49. choice

　　50. Redesigning cities and neighborhoods so that car journeys are not necessary.

　　51. likely/practical

　　Part Ⅳ Reading Comprehension(Reading in Depth)

　　Section A

　　47.第三段第一、二句講到歐洲為適應(yīng)汽車交通必須增添環(huán)城公路、單行系統(tǒng)和停車場。而美國在汽車運輸方面耗費的土地比住宅還多(In Europe most cities are still designed for the old modes of transport.Adaptation to the motor car has involved adding ring roads，one-way systems and parking lots.In the United Sates，more land is assigned to car use than to housing.)。由此可見汽車交通的出現(xiàn)對城市的發(fā)展有很大的影響。因此，答案需要填可以和have...on搭配的詞，表示“有影響”的詞。故正確答案為“impact/effect”。

　　48.由第四段倒數(shù)第二句“Yet cars easily surpass trains or buses as a flexible and convenient mode of personal transport.”可知，正確答案為“They are flexible and convenient.”或者“They easily surpass trains or buses as a flexible and convenient mode of personal transport.”。

　　49.由第五段第二句“But fuel consumption and exhaust emissions depend on which cars are preferred by customers and how they are driven.”可見燃料的消耗和污染排放取決于顧客選擇什么樣的車和怎么開車。所以單單靠技術(shù)是無法解決污染和能源耗竭的問題的。因此，此題要填的詞意思應(yīng)是“選擇”，因此正確答案為“choice”。

　　50.由文章最后一段的第一句話“One solution that has been put forward is the long-term solution of designing cities and neighborhoods so that car journeys are not necessary--all essential services being located within walking distance or easily accessible by public transport.”可知，正確答案是“Redesigning cities and neighborhoods so that car journeys are not necessary.”。

　　51.由文章最后一句“A more likely scenario seems to be a combination of mass transit systems for travel into and around cities，with small low emission cars for urban use and larger hybrid or lean burn cars for use elsewhere.”可見，這樣的方法和前面提到的“通過技術(shù)解決問題”和“重新規(guī)劃城市的長遠(yuǎn)方法”相比是更為適當(dāng)、更為可能、更為實際的。因此，我們可以回答為“l(fā)ikely”、“practical”或者其他含義相近的詞。