2. 外语
  3. A certain additive put in gasoline to reduce air pollution is actually (i)______ groundwater, a finding that shows that even the

A certain additive put in gasoline to reduce air pollution is actually (i)______ groundwater, a finding that shows that even the

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问题 A certain additive put in gasoline to reduce air pollution is actually (i)______ groundwater, a finding that shows that even the most well-intentioned fixes can sometimes (ii)______.
选项
答案A，E
解析 actually说明前后反义重复。第一空与reduce air pollution(减少空气污染)反义重复。contaminate污染，purify净化，saturate浸润。答案选A。prevail奏效，backfire适得其反，reciprocate往复运动。答案选E。
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