Since the 1940s southern California has had a reputation for smog. Things are not as bad as they once were but, according to the American Lung Association, Los Angeles is still the worst city in the United States for levels of (26)_____. Gazing down on the city from the Getty Center, an art museum in the Santa Monica Mountain, one would find the view of the Pacific Ocean blurred by the haze (霾). Nor is the state’s bad air (27)_____ to its south. Fresno, in the central valley, comes top of the list in America for year-round pollution. Residents’ hearts and lungs are affected as a (28)_____.

    All of which, combined with California’s reputation as the home of technological (29)_____, makes the place ideal for developing and testing systems designed to monitor pollution in (30)_____. And that is just what Aclima, a new firm in San Francisco, has been doing over the past few months. It has been trying out monitoring that are (31)_____ to yield minute-to-minute maps of (32)_____ air pollution. Such stations will also be able to keep an eye on what is happening inside building, including offices.

    To this end, Aclima has been (33)_____ with Google’s Street View system. Davida Herzl, Aclima’s boss, says they have revealed pollution highs on days when San Francisco’s transit workers went on strike and the city’s (34)_____ were forced to use their cars. Conversely, “cycle to work” days have done their job by (35)_____ pollution lows.

名词： consequence后果； consumers消费者；detail细节；inhabitants居民；innovation创新； pollutants污染物；sum总数

动词：assisted协助；collaborating合作；creating创造；intended打算；restricted限制；sum总结；合计

形容词： domestic国内的；家庭的；outdoor户外的； restricted受限制的

副词： frequently频繁地

26. pollutants。名词辨析题。空格前为介词of，空格后为句号，此处考查n.+of+n.的结构，故空格处应填入名词。备选项有consequence后果；consumers 消费者；detail 细节；inhabitants 居民；innovation 创新；pollutants 污染物；sum 总数。结合句意：洛杉矶仍然是美国_____水平最严重的城市。从前文的smog（烟雾）、worst和后文的haze（霾），可知此处应该填入pollutants。

27. restricted。动词辨析题。本句为倒装句，按照正常语序，空格前应该为系动词is，空格后为介词to，空格处应该填入动词过去分词构成被动语态。备选项有assisted 协助；intended 打算；restricted 限制。assisted和intended后面不与介词to连用，应与不定式连用。故此处应该填入restricted。be restricted to+地点表示“被限制在某地”。

28. consequence。名词辨析题。空格前为不定冠词a，故空格处应该填入可数名词单数形式。备选项有consequence后果；detail 细节；innovation 创新；sum 总数。前面说Fresno是美国污染城市之首，后面说居民的心脏和肺受到影响。前后文之间有因果关系，不是细节与整体的关系，as a consequence表示“结果”，符合句意。detail不符合句意。“创新”和“总数”，明显不符合句意。

29. innovation。名词辨析题。空格前为形容词，句子缺少介词of的宾语，故空格处应该填入名词。备选项有consumers 消费者；detail 细节；inhabitants 居民；innovation 创新；sum 总数。结合句意：加利福尼亚被誉为“技术____之乡”。显然只有innovation符合句意。

30. detail。名词辨析题。空格前为介词in，空格后为句号，故空格处应该填入名词。备选项有consumers 消费者；detail 细节；inhabitants 居民；sum 总数。结合句意：……使之成为开发、测试用于_____监控污染的系统的理想地点。从后文的minute-to-minute maps可知此处应该是详细监控污染，故此处应该填入detail。in detail表示“详细地”。

31. intended。动词辨析题。空格前为系动词are，空格后为不定式，空格处应该填入动词过去分词构成被动语态。备选选项有assisted 协助；intended 打算。结合句意：Aclima正在试验监控站，这些监控站_____生成实时空气污染图。显然生成实时空气污染图是监控站的用途和目的，be intended to表示“用于”，故此处应该填入intended。

32. outdoor。形容词辨析题。空格前为介词of，空格后为名词，故空格处应该填入形容词作定语。备选项有domestic 国内的；家庭的；outdoor 户外的。从后文的“这些监控站还可以监控建筑物内”，可知此处应该是说监控户外空气污染。故此处应该填入outdoor。

33. collaborating。动词辨析题。空格前为has been，空格后为介词with，空格处可以填入动词过去分词，构成现在完成时的被动语态，也可以填入动词现在分词，构成现在完成进行时。备选项有：assisted 协助；collaborating 合作；creating 创造。assist和create均不与介词with搭配，故此处应该填入collaborating。collaborate with sb.表示“与某人合作”。

34.inhabitants。名词辨析题。空格前为名词所有格city’s，空格后为动词复数were，故空格处应该填入名词复数形式。备选项有consumers消费者；inhabitants 居民。结合句意：洛杉矶的交通工人罢工，城市____不得不自己开车的日子里，污染物数值高。应该是城市居民，故此处应该填入inhabitants。

35. creating。名词辨析题，空格前为介词by，空格后为名词，故空格处应该填入动名词，只有creating一个备选项。结合句意：“骑车上班”的日子创造了污染低点。creating符合句意。