频繁手淫可造成（） 男孩频繁遗精。 女孩月经失调。 失眠头晕。 自责内疚。 以上都是。
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
旅客的人身伤亡完全是由于旅客本人的健康状况造成的，承运人不承担责任。
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。
日常教育制度包括：落实（）、开展谈心交心活动、领导干部作形势政策报告等制度。
