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1、20212021 年年 6 6 月英语四级试卷一选词填空真题：月英语四级试卷一选词填空真题：雾霾雾霾2021 年上半年全国大学英语四六级考试于 6 月 16 日进行，xx 英语四六级 24 小时关注，为你带来第一手四六级考试资讯。以下为为部分英语四级选词填空真题：Section ADirections：In this section，there is a passage with ten blanks。You arerequired to select one word for each blank from a list of choices given ina word bank foll
2、owing the passage。Read the passage through carefullybefore making your choices。Each choice in the bank is identified by aletter。Please mark the corresponding letter for each item on AnswerSheet 2 with a single line through the centre。You may not use any ofthe words in the bank more than once。Since t
3、he 1940s，southern California has had a reputation for smog。Things are not as bad as they once were but，according to the AmericanLung Association，Los Angeles is still the worst city in the United Statesfor levels of 26。Gazing down on the city from the Getty Center，an artmuseum in the Santa Monica Mou
4、ntains，one would find the view of1the Pacific Ocean blurred by the haze（霾）。Nor is the state s bad air 27to its south。Fresno，in the central valley，comes top of the list inAmerica for year-round pollution。Residents hearts and lungs areaffected as a 28。All of which，combined with Californias reputation
5、as the home oftechnological 29，makes the place ideal for developing and testingsystems designed to monitor pollution in 30。And that is just whatAclima，a new firm in San Francisco，has been doing over the past fewmonths。It has been trying out monitoring that are 31 to yieldminute-to-minute maps of 32
6、air pollution。Such stations will also beable to keep an eye on what is happening inside buildings，includingoffices。To this end，Aclima has been 33 with Googles Street View system。Davida Herzl，Aclimas boss，says they have revealed pollution highson days when San Francisco s transit workers went on strike and thecitys 34 were forced to use their cars。Conversely，“cycle to work”days have done their job by 35 pollution lows。A）assisted I）inhabitantsB）collaborating J）innovation2C）consequence K）intendedD）consumers L）outdoorE）creating M）pollutantsF）detail N）restrictedG）domestic O）H）frequentlysum3