A series of violent crimes near Denver’s Sloan’s Lake has made people in the neighborhood [填空1].A.J. Steinkee, a local citizen, says crime is at an [填空2] in the Sloan’s Lake area and that the area has become a hot spot for crime.Yet just to the north in Harkness Heights, the situation is very different because of their neighborhood watch program, which [填空3].A. J. Steinkee thinks the Sloan’s Lake area can follow the example of Harkness Heights, so he encourages his neighbors to get to know one another so they can watch out for anything or anyone [填空4].

本题主要考查根据文章上下文语境填写合适的词汇，解题关键在于理解每个空格所在句子的含义以及前后文的逻辑关系。

1. 填空1：
   • 前文提到“A series of violent crimes near Denver’s Sloan’s Lake”，即丹佛斯隆湖附近发生了一系列暴力犯罪。
   • 通常情况下，暴力犯罪会让居民感到不安。“nervous”（紧张的）、“worried”（担忧的）、“concerned”（关心的、担忧的）都能准确表达居民在这种情况下的情绪，所以此处可填这些词。
2. 填空2：
   • 后文提到“the area has become a hot spot for crime”，说明该地区已成为犯罪热点。
   • “at an all - time high”表示“达到历史最高水平”，符合犯罪率在该地区居高不下成为热点的语境，所以此处填“all - time high”。
3. 填空3：
   • 前文说“Yet just to the north in Harkness Heights, the situation is very different”，表明哈克尼斯高地的情况与斯隆湖地区不同。
   • 结合“neighborhood watch program”（邻里守望计划），可以推测这个计划起到了积极作用。“has been effective”（有效）、“works well”（运作良好）、“is successful”（成功）都能体现计划的成效，所以此处可填这些表达。
4. 填空4：
   • 前文提到“A. J. Steinkee thinks the Sloan’s Lake area can follow the example of Harkness Heights, so he encourages his neighbors to get to know one another”，即A.J.斯泰因基认为斯隆湖地区可以效仿哈克尼斯高地，鼓励邻居们相互了解。
   • 其目的是让邻居们留意任何可疑的人和事，“suspicious”（可疑的）符合语境，所以此处填“suspicious”。