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[A] install many pollution filters
[B] spray a new material on engines
[C] reduce the use of buses
[D] cut down the use of fuel
[A] fade away
[B] die away
[C] fall down
[D] die down
The word “forlornly” in Paragraph 3 means __________．
[A] indifferently
[B] unhappily
[C] angrily
[D] calmly
[A] that terrorizes us most are reports
[B] what terrorizes us most are reports
[C] it terrorizes us most are reports
[D] reports terrorize us most are
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