Shopping habits in the United States have changed greatly in the last quarter of the 20th century. （1） in the 1900s most American towns and cities had a Main Street. Main Street was always in the heart of a town. This street was （2） on both sides with many （3） businesses. Here, shoppers walked into stores to look at all sorts of merchandise: clothing, furniture, hardware, groceries. （4）,some shops offered （5） .These shops included drugstores, restaurants, shoe-repair stores, and barber or hairdressing shops. （6） in the 1950s, a change began to （7） .Too many automobiles had crowded into Main Street （8） too few parking places were （9） shoppers. Because the streets were crowded, merchants began to look with interest at the open spaces （10） the city limits. Open space is what their car-driving customers needed. And open space is what they got （11） the first shopping centre was built. Shopping centres, or rather malls, （12） as a collection of small new stores （13） crowded city centres. 14 by hundreds of free parking space, customers were drawn away from （14） areas to outlying malls. And the growing （16） of shopping centres led （17） to the building of bigger and better瞫tocked stores. （18） the late 1970s,many shopping malls had almost developed into small cities themselves. In addition to providing the （19） of one stop shopping, malls were transformed into landscaped parks, （20）benches, fountains, and outdoor entertainment.
请在17处填上正确答案（） ["on","in turn","by turns","further"]
青春期少女月经来潮（） ["影响血液系统","对健康不利","是正常的生理现象","影响体格生长","影响心脏功能"]
在结账之前，如果发现账簿记录有错误，而记账凭证填制正确，更正时可用（） ["红字更正法","划线更正法","补充登记法","更换账页法"]
19世纪30至50年代，西方国家出现的著名廉价报纸有（） ["纽约《世界报》","纽约《太阳报》","《每日电讯报》","《世纪报》","纽约《论坛报》"]
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