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  3. According to new government figures, pollution levels are rising again after

According to new government figures, pollution levels are rising again after

游客2023-07-03  87
问题     According to new government figures, pollution levels are rising again after several years of gradual decline.
    Data【C1】______Friday by the Energy Department show American factories and power plants putting more carbon dioxide into the atmosphere during the first six months of 2014 compared with the same period in each of the past two years. The figures【C2】______a reversal first seen in 2013, when the trend of steadily falling emissions【C3】______halted.
    The higher emissions are primarily a reflection of a【C4】______economy, as American businesses burned more gas and oil to meet higher demand. But the shift also highlights the challenge【C5】______the Obama administration as it seeks to honor a pledge to sharply cut U. S. emissions of greenhouse gases by the end of the decade.
    Administration officials said the【C6】______was not particularly surprising given the improving economy, and some pointed to one of the report’s bright spots: Even as the economy expanded, carbon【C7】______from automobiles have remained essentially flat, as more Americans switched to fuel-efficient cars and trucks.
    Some also cited another【C8】______trend in the report: Big jumps in the use of alternative and renewable【C9】______. Solar, wind and hydropower were up more than 7 percent compared with two years ago, according to the report, and renewable sources now【C10】______for nearly 12 percent of the country’s domestic energy production.
A)abruptly
B)account
C)accumulation
D)cited
E)confirm
F)confronting
G)emissions  
H)encouraging
I)energy
J)gradually
K)identify
L)increase
M)outstanding
N)recovering
O)released [br] 【C7】
选项
答案 G
解析 空格位于主句的主语部分，与carbon一起构成名词短语作主语。此处讲报告里的积极内容：尽管经济增长了，机动车排放的二氧化碳仍然基本持平，因为更多美国人转而选择节能型汽车或卡车，故空格处应填入emissions“排放”。从语法角度上讲，谓语部分助动词使用have，也可排除其他几个备选名词：并且，accumulation“积累”和energy“能源”均不符合文意，故排除。
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