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8处填上正确答案（） while。 yet。 though。 and the。
系统随机抽样
提高钢水纯净度的措施有哪些？
造林地上凡是与森林生长发育有关的自然环境因子综和称为造林地的（） 环境条件。 生长条件。 立地条件。 生活条件。
德育过程的基本矛盾是社会通过教师向学生提出的道德要求与（）之间的矛盾，这是德育过程中最一般、普遍的矛盾。 学生已有品德水平。 教师的道德教育水平。 学生被期望的品德发展水平。 社会的整体道德水平。
具有大型天窗的百货商场的经验表明，商场内射入的阳光可增加销售额。该百货商场的大天窗可使商场的一半地方都有阳光射入，这样可以降低人工照明需要，商场的另一半地方只有人工照明。从该商场两年前开张开始，天窗一边的各部门的销售量要远高于其他各部门的销售量。如果正确，最能支持上面论述的一项是（）。
